diff --git a/Gemfile b/Gemfile
index c3a5f5c..7bdd0cb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-ruby '2.7.6'
+ruby '>= 2.7', '< 4'
 source 'https://rubygems.org'
 
 gem 'aws-ses-v4', require: 'aws/ses'
diff --git a/Gemfile.lock b/Gemfile.lock
index cf0a57c..466d23c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -40,7 +40,7 @@ DEPENDENCIES
   colorize (~> 0.8)
 
 RUBY VERSION
-   ruby 2.7.6p219
+   ruby 3.0.0p0
 
 BUNDLED WITH
-   2.1.4
+   2.3.22
\ No newline at end of file