diff --git a/.travis.yml b/.travis.yml
index 9170e31a..ff908565 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,11 @@
+dist: xenial
 language: ruby
 cache: bundler
 bundler_args: --path ../../vendor/bundle --without debug
 rvm:
-  - 2.2.3
+  - 2.5.1
 gemfile:
-  - test/gemfiles/sass_3_3.gemfile
-  - test/gemfiles/sass_3_4.gemfile
+  - test/gemfiles/default.gemfile
 before_install:
   - "nvm install stable"
   - "npm install"
diff --git a/Gemfile b/Gemfile
index a441504c..180144ca 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,9 +2,6 @@ source 'https://rubygems.org'
 
 gemspec
 
-# Compass for the dummy app
-gem 'compass', require: false
-
 group :development do
   gem 'byebug', platform: :mri, require: false
 end
diff --git a/README.md b/README.md
index 8578ac38..de0cfe6c 100644
--- a/README.md
+++ b/README.md
@@ -13,9 +13,8 @@ This is Bootstrap **3**. For Bootstrap **4** use the [Bootstrap rubygem](https:/
 Please see the appropriate guide for your environment of choice:
 
 * [Ruby on Rails](#a-ruby-on-rails).
-* [Compass](#b-compass-without-rails) not on Rails.
-* [Bower](#c-bower).
-* [npm / Node.js](#d-npm--nodejs).
+* [Bower](#b-bower).
+* [npm / Node.js](#c-npm--nodejs).
 
 ### a. Ruby on Rails
 
@@ -25,7 +24,7 @@ In your Gemfile you need to add the `bootstrap-sass` gem, and ensure that the `s
 
 ```ruby
 gem 'bootstrap-sass', '~> 3.3.7'
-gem 'sass-rails', '>= 3.2'
+gem 'sassc-rails', '>= 1.3.0'
 ```
 
 `bundle install` and restart your server to make the files available through the pipeline.
@@ -112,49 +111,7 @@ Please make sure `sprockets-rails` is at least v2.1.4.
 
 bootstrap-sass is no longer compatible with Rails 3. The latest version of bootstrap-sass compatible with Rails 3.2 is v3.1.1.0.
 
-### b. Compass without Rails
-
-Install the gem:
-
-```console
-$ gem install bootstrap-sass
-```
-
-If you have an existing Compass project:
-
-1. Require `bootstrap-sass` in `config.rb`:
-
-    ```ruby
-    require 'bootstrap-sass'
-    ```
-
-2. Install Bootstrap with:
-
-    ```console
-    $ bundle exec compass install bootstrap -r bootstrap-sass
-    ```
-
-If you are creating a new Compass project, you can generate it with bootstrap-sass support:
-
-```console
-$ bundle exec compass create my-new-project -r bootstrap-sass --using bootstrap
-```
-
-or, alternatively, if you're not using a Gemfile for your dependencies:
-
-```console
-$ compass create my-new-project -r bootstrap-sass --using bootstrap
-```
-
-This will create a new Compass project with the following files in it:
-
-* [styles.sass](/templates/project/styles.sass) - main project Sass file, imports Bootstrap and variables.
-* [_bootstrap-variables.sass](/templates/project/_bootstrap-variables.sass) - all of Bootstrap variables, override them here.
-
-Some bootstrap-sass mixins may conflict with the Compass ones.
-If this happens, change the import order so that Compass mixins are loaded later.
-
-### c. Bower
+### b. Bower
 
 bootstrap-sass Bower package is compatible with node-sass 3.2.0+. You can install it with:
 
@@ -187,7 +144,7 @@ In `application.js`:
 
 See also this [example manifest.js](/test/dummy_node_mincer/manifest.js) for mincer.
 
-### d. npm / Node.js
+### c. npm / Node.js
 ```console
 $ npm install bootstrap-sass
 ```
@@ -212,8 +169,8 @@ In the application Sass file, replace `@import 'bootstrap'` with:
 
 bootstrap-sass [requires](https://github.com/twbs/bootstrap-sass/issues/409) minimum [Sass number precision][sass-precision] of 8 (default is 5).
 
-Precision is set for Rails and Compass automatically.
-When using Ruby Sass compiler standalone or with the Bower version you can set it with:
+Precision is set for Ruby automatically when using the `sassc-rails` gem.
+When using the npm or Bower version with Ruby, you can set it with:
 
 ```ruby
 ::Sass::Script::Value::Number.precision = [8, ::Sass::Script::Value::Number.precision].max
diff --git a/lib/bootstrap-sass.rb b/lib/bootstrap-sass.rb
index fe4288a9..3e7adf54 100644
--- a/lib/bootstrap-sass.rb
+++ b/lib/bootstrap-sass.rb
@@ -14,8 +14,11 @@ module Bootstrap
       elsif defined?(::Sass) && ::Sass.respond_to?(:load_paths)
         # The deprecated `sass` gem:
         ::Sass.load_paths << stylesheets_path
+      end
+
+      if defined?(::Sass::Script::Value::Number)
         # bootstrap requires minimum precision of 8, see https://github.com/twbs/bootstrap-sass/issues/409
-        ::Sass::Script::Number.precision = [8, ::Sass::Script::Number.precision].max
+        ::Sass::Script::Value::Number.precision = [8, ::Sass::Script::Value::Number.precision].max
       end
     end
 
diff --git a/package-lock.json b/package-lock.json
index 14f30118..3be80337 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,18 @@
       "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
       "dev": true
     },
+    "ajv": {
+      "version": "5.5.2",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
+      "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
+      "dev": true,
+      "requires": {
+        "co": "4.6.0",
+        "fast-deep-equal": "1.1.0",
+        "fast-json-stable-stringify": "2.0.0",
+        "json-schema-traverse": "0.3.1"
+      }
+    },
     "amdefine": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
@@ -35,9 +47,9 @@
       "dev": true
     },
     "are-we-there-yet": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.4.tgz",
-      "integrity": "sha1-u13KOCu5TwXhUZQ3PRb9O6HKEQ0=",
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.5.tgz",
+      "integrity": "sha512-5hYdAkZlcG8tOLujVDTgCT+uPX0VnpAH28gWsLfzpXYm7wP6mp5Q/gYyR7YQ0cKVJcXJnl3j2kpBan13PtQf6w==",
       "dev": true,
       "requires": {
         "delegates": "1.0.0",
@@ -51,15 +63,18 @@
       "dev": true
     },
     "asn1": {
-      "version": "0.2.3",
-      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.3.tgz",
-      "integrity": "sha1-2sh4dxPJlmhJ/IGAd36+nB3fO4Y=",
-      "dev": true
+      "version": "0.2.4",
+      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
+      "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
+      "dev": true,
+      "requires": {
+        "safer-buffer": "2.1.2"
+      }
     },
     "assert-plus": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz",
-      "integrity": "sha1-104bh+ev/A24qttwIfP+SBAasjQ=",
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
       "dev": true
     },
     "async-foreach": {
@@ -75,15 +90,15 @@
       "dev": true
     },
     "aws-sign2": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.6.0.tgz",
-      "integrity": "sha1-FDQt0428yU0OW4fXY81jYSwOeU8=",
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
+      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg=",
       "dev": true
     },
     "aws4": {
-      "version": "1.7.0",
-      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.7.0.tgz",
-      "integrity": "sha512-32NDda82rhwD9/JBCCkB+MRYDp0oSvlo2IL6rQWA10PQi7tDUM3eqMSltXmY+Oyl/7N3P3qNtAlv7X0d9bI28w==",
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
+      "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ==",
       "dev": true
     },
     "balanced-match": {
@@ -93,9 +108,9 @@
       "dev": true
     },
     "bcrypt-pbkdf": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.1.tgz",
-      "integrity": "sha1-Y7xdy2EzG5K8Bf1SiVPDNGKgb40=",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
+      "integrity": "sha1-pDAdOJtqQ/m2f/PKEaP2Y342Dp4=",
       "dev": true,
       "optional": true,
       "requires": {
@@ -111,15 +126,6 @@
         "inherits": "2.0.3"
       }
     },
-    "boom": {
-      "version": "2.10.1",
-      "resolved": "https://registry.npmjs.org/boom/-/boom-2.10.1.tgz",
-      "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
-      "dev": true,
-      "requires": {
-        "hoek": "2.16.3"
-      }
-    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -153,9 +159,9 @@
       }
     },
     "caseless": {
-      "version": "0.11.0",
-      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.11.0.tgz",
-      "integrity": "sha1-cVuW6phBWTzDMGeSP17GDr2k99c=",
+      "version": "0.12.0",
+      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
+      "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=",
       "dev": true
     },
     "chalk": {
@@ -182,6 +188,12 @@
         "wrap-ansi": "2.1.0"
       }
     },
+    "co": {
+      "version": "4.6.0",
+      "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
+      "integrity": "sha1-bqa989hTrlTMuOR7+gvz+QMfsYQ=",
+      "dev": true
+    },
     "code-point-at": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
@@ -197,12 +209,6 @@
         "delayed-stream": "1.0.0"
       }
     },
-    "commander": {
-      "version": "2.15.1",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
-      "integrity": "sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==",
-      "dev": true
-    },
     "concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -227,17 +233,8 @@
       "integrity": "sha1-ElYDfsufDF9549bvE14wdwGEuYI=",
       "dev": true,
       "requires": {
-        "lru-cache": "4.1.2",
-        "which": "1.3.0"
-      }
-    },
-    "cryptiles": {
-      "version": "2.0.5",
-      "resolved": "https://registry.npmjs.org/cryptiles/-/cryptiles-2.0.5.tgz",
-      "integrity": "sha1-O9/s3GCBR8HGcgL6KR59ylnqo7g=",
-      "dev": true,
-      "requires": {
-        "boom": "2.10.1"
+        "lru-cache": "4.1.3",
+        "which": "1.3.1"
       }
     },
     "currently-unhandled": {
@@ -256,14 +253,6 @@
       "dev": true,
       "requires": {
         "assert-plus": "1.0.0"
-      },
-      "dependencies": {
-        "assert-plus": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-          "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-          "dev": true
-        }
       }
     },
     "decamelize": {
@@ -285,25 +274,26 @@
       "dev": true
     },
     "ecc-jsbn": {
-      "version": "0.1.1",
-      "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz",
-      "integrity": "sha1-D8c6ntXw1Tw4GTOYUj735UN3dQU=",
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz",
+      "integrity": "sha1-OoOpBOVDUyh4dMVkt1SThoSamMk=",
       "dev": true,
       "optional": true,
       "requires": {
-        "jsbn": "0.1.1"
+        "jsbn": "0.1.1",
+        "safer-buffer": "2.1.2"
       }
     },
     "ejs": {
-      "version": "2.5.8",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-2.5.8.tgz",
-      "integrity": "sha512-QIDZL54fyV8MDcAsO91BMH1ft2qGGaHIJsJIA/+t+7uvXol1dm413fPcUgUb4k8F/9457rx4/KFE4XfDifrQxQ==",
+      "version": "2.6.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-2.6.1.tgz",
+      "integrity": "sha512-0xy4A/twfrRCnkhfk8ErDi5DqdAsAqeGxht4xkCUrsvhhbQNs7E+4jV0CN7+NKIY0aHE72+XvqtBIXzD31ZbXQ==",
       "dev": true
     },
     "error-ex": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.1.tgz",
-      "integrity": "sha1-+FWobOYa3E6GIcPNoh56dhLDqNw=",
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.2.tgz",
+      "integrity": "sha512-7dFHNmqeFSEt2ZBsCriorKnn3Z2pj+fd9kmI6QoWw4//DL+icEBfc0U7qJCisqrTsKTjw4fNFy2pW9OqStD84g==",
       "dev": true,
       "requires": {
         "is-arrayish": "0.2.1"
@@ -316,9 +306,9 @@
       "dev": true
     },
     "extend": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.1.tgz",
-      "integrity": "sha1-p1Xqe8Gt/MWjHOfnYtuq3F5jZEQ=",
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
+      "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==",
       "dev": true
     },
     "extsprintf": {
@@ -327,6 +317,18 @@
       "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU=",
       "dev": true
     },
+    "fast-deep-equal": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-1.1.0.tgz",
+      "integrity": "sha1-wFNHeBfIa1HaqFPIHgWbcz0CNhQ=",
+      "dev": true
+    },
+    "fast-json-stable-stringify": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz",
+      "integrity": "sha1-1RQsDK7msRifh9OnYREGT4bIu/I=",
+      "dev": true
+    },
     "find-up": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-1.1.2.tgz",
@@ -344,14 +346,14 @@
       "dev": true
     },
     "form-data": {
-      "version": "2.1.4",
-      "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.1.4.tgz",
-      "integrity": "sha1-M8GDrPGTJ27KqYFDpp6Uv+4XUNE=",
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.2.tgz",
+      "integrity": "sha1-SXBJi+YEwgwAXU9cI67NIda0kJk=",
       "dev": true,
       "requires": {
         "asynckit": "0.4.0",
         "combined-stream": "1.0.6",
-        "mime-types": "2.1.18"
+        "mime-types": "2.1.19"
       }
     },
     "fs.realpath": {
@@ -385,37 +387,22 @@
         "signal-exit": "3.0.2",
         "string-width": "1.0.2",
         "strip-ansi": "3.0.1",
-        "wide-align": "1.1.2"
+        "wide-align": "1.1.3"
       }
     },
     "gaze": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/gaze/-/gaze-1.1.2.tgz",
-      "integrity": "sha1-hHIkZ3rbiHDWeSV+0ziP22HkAQU=",
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/gaze/-/gaze-1.1.3.tgz",
+      "integrity": "sha512-BRdNm8hbWzFzWHERTrejLqwHDfS4GibPoq5wjTPIoJHoBtKGPg3xAFfxmM+9ztbXelxcf2hwQcaz1PtmFeue8g==",
       "dev": true,
       "requires": {
-        "globule": "1.2.0"
-      }
-    },
-    "generate-function": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/generate-function/-/generate-function-2.0.0.tgz",
-      "integrity": "sha1-aFj+fAlpt9TpCTM3ZHrHn2DfvnQ=",
-      "dev": true
-    },
-    "generate-object-property": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/generate-object-property/-/generate-object-property-1.2.0.tgz",
-      "integrity": "sha1-nA4cQDCM6AT0eDYYuTf6iPmdUNA=",
-      "dev": true,
-      "requires": {
-        "is-property": "1.0.2"
+        "globule": "1.2.1"
       }
     },
     "get-caller-file": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-1.0.2.tgz",
-      "integrity": "sha1-9wLmMSfn4jHBYKgMFVSstw1QR+U=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-1.0.3.tgz",
+      "integrity": "sha512-3t6rVToeoZfYSGd8YoLFR2DJkiQrIiUrGcjvFX2mDw3bn6k2OtwHN0TNCLbBO+w8qTvimhDkv+LSscbJY1vE6w==",
       "dev": true
     },
     "get-stdin": {
@@ -431,14 +418,6 @@
       "dev": true,
       "requires": {
         "assert-plus": "1.0.0"
-      },
-      "dependencies": {
-        "assert-plus": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-          "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-          "dev": true
-        }
       }
     },
     "glob": {
@@ -456,13 +435,13 @@
       }
     },
     "globule": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/globule/-/globule-1.2.0.tgz",
-      "integrity": "sha1-HcScaCLdnoovoAuiopUAboZkvQk=",
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/globule/-/globule-1.2.1.tgz",
+      "integrity": "sha512-g7QtgWF4uYSL5/dn71WxubOrS7JVGCnFPEnoeChJmBnyR9Mw8nGoEwOgJL/RC2Te0WhbsEUCejfH8SZNJ+adYQ==",
       "dev": true,
       "requires": {
         "glob": "7.1.2",
-        "lodash": "4.17.5",
+        "lodash": "4.17.10",
         "minimatch": "3.0.4"
       }
     },
@@ -472,16 +451,20 @@
       "integrity": "sha1-Dovf5NHduIVNZOBOp8AOKgJuVlg=",
       "dev": true
     },
+    "har-schema": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/har-schema/-/har-schema-2.0.0.tgz",
+      "integrity": "sha1-qUwiJOvKwEeCoNkDVSHyRzW37JI=",
+      "dev": true
+    },
     "har-validator": {
-      "version": "2.0.6",
-      "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-2.0.6.tgz",
-      "integrity": "sha1-zcvAgYgmWtEZtqWnyKtw7s+10n0=",
+      "version": "5.0.3",
+      "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-5.0.3.tgz",
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       "dev": true,
       "requires": {
-        "asn1": "0.2.3",
+        "asn1": "0.2.4",
         "assert-plus": "1.0.0",
-        "bcrypt-pbkdf": "1.0.1",
+        "bcrypt-pbkdf": "1.0.2",
         "dashdash": "1.14.1",
-        "ecc-jsbn": "0.1.1",
+        "ecc-jsbn": "0.1.2",
         "getpass": "0.1.7",
         "jsbn": "0.1.1",
+        "safer-buffer": "2.1.2",
         "tweetnacl": "0.14.5"
-      },
-      "dependencies": {
-        "assert-plus": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-          "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-          "dev": true
-        }
       }
     },
     "stdout-stream": {
@@ -1447,15 +1374,9 @@
       "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
       "dev": true,
       "requires": {
-        "safe-buffer": "5.1.1"
+        "safe-buffer": "5.1.2"
       }
     },
-    "stringstream": {
-      "version": "0.0.5",
-      "resolved": "https://registry.npmjs.org/stringstream/-/stringstream-0.0.5.tgz",
-      "integrity": "sha1-TkhM1N5aC7vuGORjB3EKioFiGHg=",
-      "dev": true
-    },
     "strip-ansi": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
@@ -1540,10 +1461,13 @@
       }
     },
     "tunnel-agent": {
-      "version": "0.4.3",
-      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.4.3.tgz",
-      "integrity": "sha1-Y3PbdpCf5XDgjXNYM2Xtgop07us=",
-      "dev": true
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
+      "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
+      "dev": true,
+      "requires": {
+        "safe-buffer": "5.1.2"
+      }
     },
     "tweetnacl": {
       "version": "0.14.5",
@@ -1559,15 +1483,15 @@
       "dev": true
     },
     "uuid": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.2.1.tgz",
-      "integrity": "sha512-jZnMwlb9Iku/O3smGWvZhauCf6cvvpKi4BKRiliS3cxnI+Gz9j5MEpTz2UFuXiKPJocb7gnsLHwiS05ige5BEA==",
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
+      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
       "dev": true
     },
     "validate-npm-package-license": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.3.tgz",
-      "integrity": "sha512-63ZOUnL4SIXj4L0NixR3L1lcjO38crAbgrTpl28t8jjrfuiOBL5Iygm+60qPs/KsZGzPNg6Smnc/oY16QTjF0g==",
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
+      "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
       "dev": true,
       "requires": {
         "spdx-correct": "3.0.0",
@@ -1583,20 +1507,12 @@
         "assert-plus": "1.0.0",
         "core-util-is": "1.0.2",
         "extsprintf": "1.3.0"
-      },
-      "dependencies": {
-        "assert-plus": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-          "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-          "dev": true
-        }
       }
     },
     "which": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/which/-/which-1.3.0.tgz",
-      "integrity": "sha512-xcJpopdamTuY5duC/KnTTNBraPK54YwpenP4lzxU8H91GudWpFv38u0CKjclE1Wi2EH2EDz5LRcHcKbCIzqGyg==",
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
       "dev": true,
       "requires": {
         "isexe": "2.0.0"
@@ -1609,9 +1525,9 @@
       "dev": true
     },
     "wide-align": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.2.tgz",
-      "integrity": "sha512-ijDLlyQ7s6x1JgCLur53osjm/UXUYD9+0PbYKrBsYisYXzCxN+HC3mYDNy/dWdmf3AwqwU3CXwDCvsNgGK1S0w==",
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
+      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
       "dev": true,
       "requires": {
         "string-width": "1.0.2"
@@ -1633,12 +1549,6 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
-    "xtend": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
-      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
-      "dev": true
-    },
     "y18n": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.1.tgz",
@@ -1660,7 +1570,7 @@
         "camelcase": "3.0.0",
         "cliui": "3.2.0",
         "decamelize": "1.2.0",
-        "get-caller-file": "1.0.2",
+        "get-caller-file": "1.0.3",
         "os-locale": "1.4.0",
         "read-pkg-up": "1.0.1",
         "require-directory": "2.1.1",
diff --git a/package.json b/package.json
index 0e4d45aa..58dcd173 100644
--- a/package.json
+++ b/package.json
@@ -33,9 +33,9 @@
     "url": "https://github.com/twbs/bootstrap-sass/issues"
   },
   "devDependencies": {
-    "node-sass": "^4.8.3",
+    "node-sass": "^4.9.3",
     "mincer": "~1.4.0",
-    "ejs": "~2.5.8"
+    "ejs": "~2.6.1"
   },
   "eyeglass": {
     "exports": "eyeglass-exports.js",
diff --git a/test/compass_test.rb b/test/compass_test.rb
deleted file mode 100644
index e7c4fb71..00000000
--- a/test/compass_test.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-require 'test_helper'
-
-class CompassTest < Minitest::Test
-  def test_create_project
-    command = 'rm -rf tmp/new-compass-project; bundle exec compass create tmp/new-compass-project -r bootstrap-sass --using bootstrap --trace --force'
-    success = silence_stdout_if(!ENV['VERBOSE']) { Bundler.with_original_env { system(command) } }
-    assert success, 'Compass project creation failed!'
-  end
-end
diff --git a/test/gemfiles/default.gemfile b/test/gemfiles/default.gemfile
new file mode 100644
index 00000000..6cb27674
--- /dev/null
+++ b/test/gemfiles/default.gemfile
@@ -0,0 +1,3 @@
+source 'https://rubygems.org'
+
+gemspec path: '../../'
diff --git a/test/gemfiles/sass_3_3.gemfile b/test/gemfiles/sass_3_3.gemfile
deleted file mode 100644
index 9504cf20..00000000
--- a/test/gemfiles/sass_3_3.gemfile
+++ /dev/null
@@ -1,9 +0,0 @@
-source "https://rubygems.org"
-
-gem 'sass', '~> 3.3.14'
-gem 'compass', '~> 1.0.1', require: false
-
-# See https://github.com/sass/sass/pull/2015
-gem 'rake', '~> 10.5.0'
-
-gemspec path: '../../'
diff --git a/test/gemfiles/sass_3_4.gemfile b/test/gemfiles/sass_3_4.gemfile
deleted file mode 100644
index fd89fa72..00000000
--- a/test/gemfiles/sass_3_4.gemfile
+++ /dev/null
@@ -1,7 +0,0 @@
-source "https://rubygems.org"
-
-gem 'sass', '~> 3.4.1'
-gem 'compass', '~> 1.0.1', require: false
-
-gemspec path: '../../'
-
diff --git a/test/node_sass_compile_test.sh b/test/node_sass_compile_test.sh
index 1ab6313d..257b54c4 100755
--- a/test/node_sass_compile_test.sh
+++ b/test/node_sass_compile_test.sh
@@ -4,5 +4,6 @@
 
 mkdir -p tmp/node-sass
 node_modules/.bin/node-sass assets/stylesheets/_bootstrap.scss -o tmp/node-sass/bootstrap.css && \
-node_modules/.bin/node-sass assets/stylesheets/bootstrap/_theme.scss -o tmp/node-sass/bootstrap-theme.css || \
+node_modules/.bin/node-sass --include-path=assets/stylesheets/ \
+  assets/stylesheets/bootstrap/_theme.scss -o tmp/node-sass/bootstrap-theme.css || \
 (echo "node-sass compilation failed" && exit 1)
diff --git a/test/sprockets_rails_test.rb b/test/sprockets_rails_test.rb
index 4969f289..669e3f26 100644
--- a/test/sprockets_rails_test.rb
+++ b/test/sprockets_rails_test.rb
@@ -14,7 +14,7 @@ class SprocketsRailsTest < Minitest::Test
         Bundler.with_original_env do
           system({ 'BUNDLE_GEMFILE' => File.join(GEM_PATH, 'Gemfile'),
                    'RAILS_ENV' => 'production' },
-                 'bundle exec rake assets:precompile')
+                 'bundle && bundle exec rake assets:precompile')
         end
       end
     end