diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 53fbee6..9adfb80 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
         rubocop_version: [""]
         include:
         - ruby: "2.6"
-          rubocop_version: "'1.0.0'"
+          rubocop_version: "'1.45.0'"
         - ruby: "3.2"
           rubocop_version: "github: 'rubocop/rubocop'"
     steps:
diff --git a/rubocop-md.gemspec b/rubocop-md.gemspec
index 47629a3..b2b2376 100644
--- a/rubocop-md.gemspec
+++ b/rubocop-md.gemspec
@@ -27,7 +27,7 @@ Gem::Specification.new do |spec|
 
   spec.require_paths = ["lib"]
 
-  spec.add_runtime_dependency "rubocop", ">= 1.0"
+  spec.add_runtime_dependency "rubocop", ">= 1.45"
 
   spec.add_development_dependency "bundler", ">= 1.15"
   spec.add_development_dependency "rake", ">= 13.0"