diff --git a/Gemfile.lock b/Gemfile.lock
index bbc54ce2..0efbffbb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -176,7 +176,7 @@ GEM
     multi_json (1.15.0)
     multi_xml (0.6.0)
     mutex_m (0.2.0)
-    mysql2 (0.5.4)
+    mysql2 (0.5.6)
     net-imap (0.4.11)
       date
       net-protocol
@@ -444,4 +444,4 @@ DEPENDENCIES
   will_paginate-bulma (~> 1.0)
 
 BUNDLED WITH
-   2.5.10
+   2.5.11