diff --git a/Gemfile.lock b/Gemfile.lock
index 842b9762..218fc35e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,5 +1,5 @@
 GIT
-  remote: git://github.com/saulabs/trueskill.git
+  remote: https://github.com/saulabs/trueskill.git
   revision: d15b0752cb4be5ff27f26e5dbbac520680446355
   specs:
     trueskill (1.0.0)
@@ -164,10 +164,10 @@ GEM
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
     thor (0.19.1)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     tilt (1.4.1)
     timecop (0.8.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.11)
       thread_safe (~> 0.1)
     uglifier (2.7.2)
       execjs (>= 0.3.0)