diff --git a/Gemfile b/Gemfile
index 7f92cb75..d0280732 100644
--- a/Gemfile
+++ b/Gemfile
@@ -104,7 +104,7 @@ gem 'settingslogic'
 # github-linquist needs pygments 0.4.2 but Gollum 2.4.11
 # requires pygments 0.3.2. The latest master Gollum has been updated
 # to use pygments 0.4.2. Change this after next Gollum release.
-gem "gollum", "~> 2.4.0", git: "git://github.com/gollum/gollum.git", ref: "5dcd3c8c8f"
+gem "gollum", "~> 2.4.0", git: "https://github.com/gollum/gollum.git", ref: "5dcd3c8c8f"
 
 # Misc
 gem "foreman"
diff --git a/Gemfile.lock b/Gemfile.lock
index 4de5c893..f2800771 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,5 +1,5 @@
 GIT
-  remote: git://github.com/gollum/gollum.git
+  remote: https://github.com/gollum/gollum.git
   revision: 5dcd3c8c8f68158e43ff79861279088ee56d0ebe
   ref: 5dcd3c8c8f
   specs: