diff --git a/Gemfile b/Gemfile
index e6ceff9..9193219 100644
--- a/Gemfile
+++ b/Gemfile
@@ -61,7 +61,7 @@ group :development do
 end
 
 group :test do
-  gem 'shoulda-matchers', '~> 5.0'
+  gem 'shoulda-matchers', '~> 6.4'
 end
 
 
diff --git a/Gemfile.lock b/Gemfile.lock
index aeadb6e..4735632 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -273,7 +273,7 @@ GEM
       rubocop-rails
     ruby-progressbar (1.13.0)
     securerandom (0.3.1)
-    shoulda-matchers (5.3.0)
+    shoulda-matchers (6.4.0)
       activesupport (>= 5.2.0)
     stringio (3.1.1)
     thor (1.3.2)
@@ -313,7 +313,7 @@ DEPENDENCIES
   redis-rails
   rspec-rails (~> 6.1.2)
   rubocop-rails-omakase
-  shoulda-matchers (~> 5.0)
+  shoulda-matchers (~> 6.4)
   tzinfo-data
 
 BUNDLED WITH