diff --git a/Gemfile b/Gemfile
index d10269d7aac..ab151e4171f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,7 +16,7 @@ gem 'mysql2', '~> 0.4.5', group: :mysql
 gem 'pg', '~> 0.18.2', group: :postgres
 
 gem 'rugged', '~> 0.26.0'
-gem 'grape-route-helpers', '~> 2.0.0'
+gem 'grape-route-helpers', '~> 2.1.0'
 
 gem 'faraday', '~> 0.12'
 
@@ -76,7 +76,7 @@ gem 'gollum-rugged_adapter', '~> 0.4.4', require: false
 gem 'github-linguist', '~> 4.7.0', require: 'linguist'
 
 # API
-gem 'grape', '~> 0.19.2'
+gem 'grape', '~> 1.0'
 gem 'grape-entity', '~> 0.6.0'
 gem 'rack-cors', '~> 0.4.0', require: 'rack/cors'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index f7ad7bcbc6e..1554f314d1e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -342,12 +342,9 @@ GEM
       signet (~> 0.7)
     gpgme (2.0.13)
       mini_portile2 (~> 2.1)
-    grape (0.19.2)
+    grape (1.0.0)
       activesupport
       builder
-      hashie (>= 2.1.0)
-      multi_json (>= 1.3.2)
-      multi_xml (>= 0.5.2)
       mustermann-grape (~> 1.0.0)
       rack (>= 1.3.0)
       rack-accept
@@ -355,9 +352,9 @@ GEM
     grape-entity (0.6.0)
       activesupport
       multi_json (>= 1.3.2)
-    grape-route-helpers (2.0.0)
+    grape-route-helpers (2.1.0)
       activesupport
-      grape (~> 0.16, >= 0.16.0)
+      grape (>= 0.16.0)
       rake
     grpc (1.4.0)
       google-protobuf (~> 3.1)
@@ -375,7 +372,7 @@ GEM
       thor
       tilt
     hashdiff (0.3.4)
-    hashie (3.5.5)
+    hashie (3.5.6)
     hashie-forbidden_attributes (0.1.1)
       hashie (>= 3.0)
     health_check (2.6.0)
@@ -1035,9 +1032,9 @@ DEPENDENCIES
   gon (~> 6.1.0)
   google-api-client (~> 0.8.6)
   gpgme
-  grape (~> 0.19.2)
+  grape (~> 1.0)
   grape-entity (~> 0.6.0)
-  grape-route-helpers (~> 2.0.0)
+  grape-route-helpers (~> 2.1.0)
   haml_lint (~> 0.26.0)
   hamlit (~> 2.6.1)
   hashie-forbidden_attributes
diff --git a/changelogs/unreleased/zj-upgrade-grape.yml b/changelogs/unreleased/zj-upgrade-grape.yml
new file mode 100644
index 00000000000..daa6a234c07
--- /dev/null
+++ b/changelogs/unreleased/zj-upgrade-grape.yml
@@ -0,0 +1,5 @@
+---
+title: Upgrade grape to 1.0
+merge_request:
+author:
+type: other
diff --git a/lib/api/helpers.rb b/lib/api/helpers.rb
index 3582ed81b0f..b56fd2388b3 100644
--- a/lib/api/helpers.rb
+++ b/lib/api/helpers.rb
@@ -290,7 +290,7 @@ module API
 
     def uploaded_file(field, uploads_path)
       if params[field]
-        bad_request!("#{field} is not a file") unless params[field].respond_to?(:filename)
+        bad_request!("#{field} is not a file") unless params[field][:filename]
         return params[field]
       end
 
diff --git a/lib/api/jobs.rb b/lib/api/jobs.rb
index 8a67de10bca..a40018b214e 100644
--- a/lib/api/jobs.rb
+++ b/lib/api/jobs.rb
@@ -16,9 +16,9 @@ module API
                              case scope
                              when String
                                [scope]
-                             when Hashie::Mash
+                             when ::Hash
                                scope.values
-                             when Hashie::Array
+                             when ::Array
                                scope
                              else
                                ['unknown']
diff --git a/lib/api/templates.rb b/lib/api/templates.rb
index 0fc13b35d5b..f70bc0622b7 100644
--- a/lib/api/templates.rb
+++ b/lib/api/templates.rb
@@ -57,7 +57,7 @@ module API
     end
     get "templates/licenses" do
       options = {
-        featured: declared(params).popular.present? ? true : nil
+        featured: declared(params)[:popular].present? ? true : nil
       }
       licences = ::Kaminari.paginate_array(Licensee::License.all(options))
       present paginate(licences), with: Entities::RepoLicense
@@ -71,7 +71,7 @@ module API
       requires :name, type: String, desc: 'The name of the template'
     end
     get "templates/licenses/:name", requirements: { name: /[\w\.-]+/ } do
-      not_found!('License') unless Licensee::License.find(declared(params).name)
+      not_found!('License') unless Licensee::License.find(declared(params)[:name])
 
       template = parsed_license_template
 
@@ -102,7 +102,7 @@ module API
         requires :name, type: String, desc: 'The name of the template'
       end
       get "templates/#{template_type}/:name" do
-        new_template = klass.find(declared(params).name)
+        new_template = klass.find(declared(params)[:name])
 
         render_response(template_type, new_template)
       end
diff --git a/lib/api/v3/builds.rb b/lib/api/v3/builds.rb
index 93ad9eb26b8..c189d486f50 100644
--- a/lib/api/v3/builds.rb
+++ b/lib/api/v3/builds.rb
@@ -16,7 +16,7 @@ module API
                              coerce_with: ->(scope) {
                                             if scope.is_a?(String)
                                               [scope]
-                                            elsif   scope.is_a?(Hashie::Mash)
+                                            elsif   scope.is_a?(::Hash)
                                               scope.values
                                             else
                                               ['unknown']
diff --git a/lib/api/v3/templates.rb b/lib/api/v3/templates.rb
index 4c577a8d2b7..2a2fb59045c 100644
--- a/lib/api/v3/templates.rb
+++ b/lib/api/v3/templates.rb
@@ -59,7 +59,7 @@ module API
         end
         get route do
           options = {
-            featured: declared(params).popular.present? ? true : nil
+            featured: declared(params)[:popular].present? ? true : nil
           }
           present Licensee::License.all(options), with: ::API::Entities::RepoLicense
         end
@@ -76,7 +76,7 @@ module API
           requires :name, type: String, desc: 'The name of the template'
         end
         get route, requirements: { name: /[\w\.-]+/ } do
-          not_found!('License') unless Licensee::License.find(declared(params).name)
+          not_found!('License') unless Licensee::License.find(declared(params)[:name])
 
           template = parsed_license_template
 
@@ -111,7 +111,7 @@ module API
             requires :name, type: String, desc: 'The name of the template'
           end
           get route do
-            new_template = klass.find(declared(params).name)
+            new_template = klass.find(declared(params)[:name])
 
             render_response(template_type, new_template)
           end