diff --git a/Gemfile.lock b/Gemfile.lock
index 54b26a5..c77cf5a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,7 +81,7 @@ GEM
       slop (~> 3.4)
     public_suffix (3.0.0)
     rainbow (3.0.0)
-    rake (10.5.0)
+    rake (13.0.1)
     rb-fsevent (0.9.8)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
@@ -127,7 +127,7 @@ DEPENDENCIES
   guard-rspec (~> 4.7)
   listen (= 3.0.7)
   pry
-  rake (~> 10.0)
+  rake (~> 13.0)
   rspec (~> 3.4)
   rubocop (~> 0.49)
   yard (~> 0.9.11)
diff --git a/danger-code_style_validation.gemspec b/danger-code_style_validation.gemspec
old mode 100755
new mode 100644
index e094bb5..0fcb97c
--- a/danger-code_style_validation.gemspec
+++ b/danger-code_style_validation.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
 
   # General ruby development
   spec.add_development_dependency 'bundler', '~> 1.3'
-  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'rake', '~> 13.0'
 
   # Testing support
   spec.add_development_dependency 'rspec', '~> 3.4'