diff --git a/Gemfile.lock b/Gemfile.lock
index 4498ddb5..cafef611 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -75,7 +75,7 @@ GEM
     coderay (1.1.3)
     concurrent-ruby (1.2.3)
     crass (1.0.6)
-    date (3.3.4)
+    date (3.5.1)
     enumerations (2.5.3)
       activerecord
       activesupport
@@ -116,7 +116,7 @@ GEM
     multi_xml (0.6.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
-    net-imap (0.3.7)
+    net-imap (0.5.15)
       date
       net-protocol
     net-pop (0.1.2)
@@ -211,7 +211,7 @@ GEM
       sprockets (>= 3.0.0)
     thor (1.3.1)
     tilt (2.3.0)
-    timeout (0.4.1)
+    timeout (0.6.1)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     websocket-driver (0.7.6)