diff --git a/Gemfile b/Gemfile
index 5b53bab..3470d09 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source "http://rubygems.org"
+source "https://rubygems.org"
 
 # Specify your gem's dependencies in omniauth-google-apps.gemspec
 gemspec
diff --git a/Gemfile.lock b/Gemfile.lock
index bd420a1..5657b32 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,7 @@ PATH
       ruby-openid-apps-discovery (~> 1.2.0)
 
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     addressable (2.2.6)
     crack (0.3.1)
@@ -86,3 +86,6 @@ DEPENDENCIES
   sinatra
   thin
   webmock
+
+BUNDLED WITH
+   1.15.3