diff --git a/Gemfile b/Gemfile
index ad2ccb9254fd5a47bd52c544277125e03f99af23..0cf26980dc6ce9a0d6cc8a675df0ece5e5f4d7f2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -129,7 +129,7 @@ group :development do
   gem 'better_errors', '~> 2.9'
   gem 'binding_of_caller', '~> 1.0'
   gem 'bullet', '~> 7.0'
-  gem 'letter_opener', '~> 1.7'
+  gem 'letter_opener', '~> 1.8'
   gem 'letter_opener_web', '~> 2.0'
   gem 'memory_profiler'
   gem 'rubocop', '~> 1.26', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 464993ccba582cf13d8b8ca9e6449564ce842fcc..cafb814a67ab7e2379a85507db079020f7d00a1b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -349,8 +349,8 @@ GEM
       terrapin (~> 0.6.0)
     launchy (2.5.0)
       addressable (~> 2.7)
-    letter_opener (1.7.0)
-      launchy (~> 2.2)
+    letter_opener (1.8.1)
+      launchy (>= 2.2, < 3)
     letter_opener_web (2.0.0)
       actionmailer (>= 5.2)
       letter_opener (~> 1.7)
@@ -770,7 +770,7 @@ DEPENDENCIES
   json-ld-preloaded (~> 3.2)
   kaminari (~> 1.2)
   kt-paperclip (~> 7.1)
-  letter_opener (~> 1.7)
+  letter_opener (~> 1.8)
   letter_opener_web (~> 2.0)
   link_header (~> 0.0)
   lograge (~> 0.11)