diff --git a/Gemfile.lock b/Gemfile.lock
index 08ac8cd9..aa853648 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -329,7 +329,7 @@ GEM
       railties (>= 3.0)
     multi_json (1.15.0)
     multi_xml (0.6.0)
-    mysql2 (0.5.4)
+    mysql2 (0.5.5)
     net-imap (0.2.3)
       digest
       net-protocol