diff --git a/Gemfile b/Gemfile
index a27cba710..b0284d8c0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -124,7 +124,7 @@ group :development do
   gem 'better_errors', '~> 2.5'
   gem 'binding_of_caller', '~> 0.7'
   gem 'bullet', '~> 5.9'
-  gem 'letter_opener', '~> 1.4'
+  gem 'letter_opener', '~> 1.7'
   gem 'letter_opener_web', '~> 1.3'
   gem 'memory_profiler'
   gem 'rubocop', '~> 0.61', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 9e9351722..c42142aed 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -310,7 +310,7 @@ GEM
     kaminari-core (1.1.1)
     launchy (2.4.3)
       addressable (~> 2.3)
-    letter_opener (1.6.0)
+    letter_opener (1.7.0)
       launchy (~> 2.2)
     letter_opener_web (1.3.4)
       actionmailer (>= 3.2)
@@ -699,7 +699,7 @@ DEPENDENCIES
   json-ld (~> 2.2)
   json-ld-preloaded (~> 3.0)
   kaminari (~> 1.1)
-  letter_opener (~> 1.4)
+  letter_opener (~> 1.7)
   letter_opener_web (~> 1.3)
   link_header (~> 0.0)
   lograge (~> 0.10)