diff --git a/Gemfile.lock b/Gemfile.lock
index 14e4a688f..bdbf82cd7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -135,7 +135,7 @@ GEM
     crack (0.4.5)
       rexml
     crass (1.0.6)
-    date (3.3.4)
+    date (3.4.1)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     docile (1.4.0)
@@ -217,7 +217,7 @@ GEM
     multi_xml (0.6.0)
     multipart-post (2.3.0)
     mysql2 (0.5.6)
-    net-imap (0.4.12)
+    net-imap (0.4.19)
       date
       net-protocol
     net-pop (0.1.2)
@@ -387,7 +387,7 @@ GEM
     thor (1.3.1)
     thread_safe (0.3.6)
     tilt (2.2.0)
-    timeout (0.4.1)
+    timeout (0.4.3)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.5.0)