diff --git a/Gemfile.lock b/Gemfile.lock
index 40c50a03..0418fefb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -305,10 +305,8 @@ GEM
     naught (1.1.0)
     nenv (0.3.0)
     nested_form (0.3.2)
-    net-imap (0.2.3)
-      digest
+    net-imap (0.3.1)
       net-protocol
-      strscan
     net-pop (0.1.1)
       digest
       net-protocol
@@ -520,7 +518,6 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
-    strscan (3.0.3)
     sysexits (1.2.0)
     temple (0.8.2)
     thor (1.2.1)