diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..77fee73
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+1.9.3
diff --git a/Gemfile b/Gemfile
index 4bc6e3e..98a042b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,4 @@
 source 'https://rubygems.org'
+ruby File.read('.ruby-version').strip
 
-gem "github-pages"
\ No newline at end of file
+gem "github-pages"