diff --git a/Gemfile.lock b/Gemfile.lock
index 1b21f84..62f8c87 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -186,7 +186,7 @@ GEM
     mocha (2.8.2)
       ruby2_keywords (>= 0.0.5)
     mustermann (3.1.1)
-    net-imap (0.6.4)
+    net-imap (0.6.4.1)
       date
       net-protocol
     net-pop (0.1.2)