diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 909851d..7a90413 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,7 +6,7 @@ jobs:
   rspec:
     strategy:
       matrix:
-        ruby: [2.5, 2.6, 2.7, 3.0, 3.1, 3.2, 3.3]
+        ruby: [2.6, 2.7, 3.0, 3.1, 3.2, 3.3]
 
     runs-on: ubuntu-latest
 
diff --git a/address_composer.gemspec b/address_composer.gemspec
index 61ed386..178d3cc 100644
--- a/address_composer.gemspec
+++ b/address_composer.gemspec
@@ -23,7 +23,7 @@ Gem::Specification.new do |gem|
     `git ls-files --recurse-submodules -z`.split("\x0").reject { |f| f.match(%r{^(spec)/}) }
   end
 
-  gem.required_ruby_version = ">= 2.5"
+  gem.required_ruby_version = ">= 2.6"
   gem.require_paths = ["lib"]
 
   gem.add_runtime_dependency "mustache", ">= 1.1"