diff --git a/v2.5-rails/Gemfile.lock b/v2.5-rails/Gemfile.lock
index 7d037a7..e98101e 100644
--- a/v2.5-rails/Gemfile.lock
+++ b/v2.5-rails/Gemfile.lock
@@ -177,7 +177,7 @@ GEM
     minitest (6.0.6)
       drb (~> 2.0)
       prism (~> 1.5)
-    net-imap (0.6.4)
+    net-imap (0.6.4.1)
       date
       net-protocol
     net-pop (0.1.2)