diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 9e42250..802334c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,6 +14,7 @@ jobs:
     strategy:
       matrix:
         ruby:
+          - '3.0'
           - '3.1'
           - '3.2'
 
diff --git a/rubrik.gemspec b/rubrik.gemspec
index 1154dea..a9afced 100644
--- a/rubrik.gemspec
+++ b/rubrik.gemspec
@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.description = "Sign PDFs digitally in pure Ruby"
   spec.homepage = "https://github.com/tomascco/rubrik"
   spec.license = "MIT"
-  spec.required_ruby_version = ">= 3.1.0"
+  spec.required_ruby_version = ">= 3.0.0"
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = "https://github.com/tomascco/rubrik"