diff --git a/Gemfile.lock b/Gemfile.lock
index e214bd1e..cf425065 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -226,7 +226,7 @@ GEM
     multipart-post (2.4.1)
     mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
-    net-imap (0.5.5)
+    net-imap (0.5.6)
       date
       net-protocol
     net-pop (0.1.2)