diff --git a/Gemfile b/Gemfile
index d1fe931..0675ae1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source "http://rubygems.org"
+source "https://rubygems.org"
 
 # Specify your gem's dependencies in libv8.gemspec
 gemspec