diff --git a/Gemfile.lock b/Gemfile.lock
index 8db13141e..0a7e3a460 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -363,7 +363,7 @@ GEM
     msgpack (1.8.0)
     net-http (0.9.1)
       uri (>= 0.11.1)
-    net-imap (0.5.14)
+    net-imap (0.5.15)
       date
       net-protocol
     net-pop (0.1.2)