diff --git a/Gemfile b/Gemfile
index 374b5ca00..a5686b103 100644
--- a/Gemfile
+++ b/Gemfile
@@ -46,5 +46,5 @@ group :rubocop do
   gem "rubocop"
 end
 
-gem "net-imap", "~> 0.4.17"
+gem "net-imap", "~> 0.4.18"
 gem "zeitwerk", "~> 2.6.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index 019572016..269e8ef51 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -141,7 +141,7 @@ GEM
     mini_portile2 (2.8.8)
     minitest (5.25.1)
     msgpack (1.7.3)
-    net-imap (0.4.17)
+    net-imap (0.4.18)
       date
       net-protocol
     net-pop (0.1.2)
@@ -334,7 +334,7 @@ DEPENDENCIES
   image_processing
   inline_svg
   listen
-  net-imap (~> 0.4.17)
+  net-imap (~> 0.4.18)
   puma
   rack-mini-profiler
   rails (~> 6.1.7.10)