diff --git a/Gemfile.lock b/Gemfile.lock
index f211f34..a1fb616 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -107,7 +107,7 @@ GEM
     mustermann (3.1.1)
     net-http (0.9.1)
       uri (>= 0.11.1)
-    net-imap (0.6.4)
+    net-imap (0.6.4.1)
       date
       net-protocol
     net-pop (0.1.2)