diff --git a/Gemfile.lock b/Gemfile.lock
index c242db4f..0efae6f1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -138,6 +138,7 @@ GEM
       activerecord (>= 5.a)
       database_cleaner-core (~> 2.0.0)
     database_cleaner-core (2.0.1)
+    date (3.3.0)
     debug_inspector (1.1.0)
     diff-lcs (1.5.0)
     docile (1.4.0)
@@ -260,11 +261,12 @@ GEM
     nested_form (0.3.2)
     net-http-persistent (4.0.1)
       connection_pool (~> 2.2)
-    net-imap (0.3.1)
+    net-imap (0.3.2)
+      date
       net-protocol
     net-pop (0.1.2)
       net-protocol
-    net-protocol (0.2.0)
+    net-protocol (0.2.1)
       timeout
     net-smtp (0.3.3)
       net-protocol