diff --git a/Gemfile.lock b/Gemfile.lock
index 41a0071..e499b69 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -77,7 +77,7 @@ GEM
     mini_mime (1.1.2)
     mini_portile2 (2.8.8)
     minitest (5.18.0)
-    net-imap (0.3.8)
+    net-imap (0.3.9)
       date
       net-protocol
     net-pop (0.1.2)