diff --git a/docs/Gemfile b/docs/Gemfile
index 4fb8aeb49..1df728b9e 100644
--- a/docs/Gemfile
+++ b/docs/Gemfile
@@ -31,7 +31,7 @@ platforms :mingw, :x64_mingw, :mswin, :jruby do
 end
 
 # Performance-booster for watching directories on Windows
-gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
+gem "wdm", "~> 0.2.0", :platforms => [:mingw, :x64_mingw, :mswin]
 
 # Lock `http_parser.rb` gem to `v0.6.x` on JRuby builds since newer versions of the gem
 # do not have a Java counterpart.