diff --git a/Gemfile b/Gemfile
index 1103c6d69..6dbc733ec 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,7 +22,7 @@ gem 'commonmarker', '~> 2.3.0'
 
 #  Ruby Standard Gems
 gem 'csv', '~> 3.3.2'
-gem 'net-imap', '~> 0.5.4'
+gem 'net-imap', '~> 0.5.7'
 gem 'net-pop', '~> 0.1.2'
 gem 'net-smtp', '~> 0.5.0'