diff --git a/Gemfile.lock b/Gemfile.lock
index 15430724..6dad3eec 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ PATH
       activesupport (>= 4.2, < 5.2)
       addressable (~> 2.3)
       backports (~> 3.11)
-      bundler (~> 1.1)
+      bundler
       contracts (~> 0.16.0)
       dotenv
       erubis
diff --git a/middleman-core/middleman-core.gemspec b/middleman-core/middleman-core.gemspec
index 75eccaae..380a0dca 100644
--- a/middleman-core/middleman-core.gemspec
+++ b/middleman-core/middleman-core.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
   s.required_ruby_version = '>= 2.3.0'
 
   # Core
-  s.add_dependency('bundler', ['~> 1.1'])
+  s.add_dependency('bundler')
   s.add_dependency('rack', ['>= 1.4.5', '< 3'])
   s.add_dependency('tilt', ['~> 2.0'])
   s.add_dependency('erubis')