diff --git a/docs/Gemfile b/docs/Gemfile
index 11492248..b25b5196 100644
--- a/docs/Gemfile
+++ b/docs/Gemfile
@@ -27,5 +27,5 @@ 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]