diff --git a/CHANGELOG.md b/CHANGELOG.md
index 67956b0..8c7a3ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Unreleased
+
+- Updates rubocop-performance from 1.19.0 to [1.19.1](https://github.com/rubocop/rubocop-performance/releases/tag/v1.19.1)
+
 ## [1.2.0]
 
 - Updates rubocop-performance from 1.18.0 to 1.19.0
diff --git a/Gemfile.lock b/Gemfile.lock
index 2b030f8..5abdd31 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     standard-performance (1.2.0)
       lint_roller (~> 1.1)
-      rubocop-performance (~> 1.19.0)
+      rubocop-performance (~> 1.19.1)
 
 GEM
   remote: https://rubygems.org/
@@ -17,7 +17,6 @@ GEM
       rake (>= 0.9.2.2)
     method_source (1.0.0)
     minitest (5.19.0)
-    mocktail (1.2.2)
     parallel (1.23.0)
     parser (3.2.2.3)
       ast (~> 2.4.1)
@@ -39,7 +38,7 @@ GEM
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.29.0)
       parser (>= 3.2.1.0)
-    rubocop-performance (1.19.0)
+    rubocop-performance (1.19.1)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
     ruby-progressbar (1.13.0)
@@ -62,7 +61,6 @@ PLATFORMS
 DEPENDENCIES
   m
   minitest
-  mocktail
   rake
   standard
   standard-performance!
diff --git a/standard-performance.gemspec b/standard-performance.gemspec
index 08c8b24..c1b5d68 100644
--- a/standard-performance.gemspec
+++ b/standard-performance.gemspec
@@ -29,5 +29,5 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "lint_roller", "~> 1.1"
-  spec.add_dependency "rubocop-performance", "~> 1.19.0"
+  spec.add_dependency "rubocop-performance", "~> 1.19.1"
 end