diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a9fd9a..e574a78 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Unreleased
+
+- Updates rubocop-performance from 1.20.1 to [1.21.0](https://github.com/rubocop/rubocop-performance/releases/tag/v1.21.0)
+
 ## [1.3.1]
 
 - Updates rubocop-performance from 1.20.1 to [1.20.2](https://github.com/rubocop/rubocop-performance/releases/tag/v1.20.2)
diff --git a/Gemfile.lock b/Gemfile.lock
index 4d19547..1f361e6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     standard-performance (1.3.1)
       lint_roller (~> 1.1)
-      rubocop-performance (~> 1.20.2)
+      rubocop-performance (~> 1.21.0)
 
 GEM
   remote: https://rubygems.org/
@@ -18,7 +18,7 @@ GEM
     method_source (1.0.0)
     minitest (5.19.0)
     parallel (1.24.0)
-    parser (3.3.0.2)
+    parser (3.3.1.0)
       ast (~> 2.4.1)
       racc
     racc (1.7.3)
@@ -37,11 +37,11 @@ GEM
       rubocop-ast (>= 1.30.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.30.0)
-      parser (>= 3.2.1.0)
-    rubocop-performance (1.20.2)
+    rubocop-ast (1.31.3)
+      parser (>= 3.3.1.0)
+    rubocop-performance (1.21.0)
       rubocop (>= 1.48.1, < 2.0)
-      rubocop-ast (>= 1.30.0, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
     ruby-progressbar (1.13.0)
     standard (1.33.0)
       language_server-protocol (~> 3.17.0.2)
diff --git a/standard-performance.gemspec b/standard-performance.gemspec
index d14f96f..d823a2c 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", "~> 1.20.2"
+  spec.add_dependency "rubocop-performance", "~> 1.21.0"
 end