diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 159066c..0825228 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         # Test only supported versions: https://endoflife.date/ruby
-        ruby-version: [ '3.0', '3.1', '3.2', '3.3', jruby, truffleruby ]
+        ruby-version: [ '3.1', '3.2', '3.3', head, jruby, truffleruby ]
 
     steps:
     - uses: actions/checkout@v3
diff --git a/Appraisals b/Appraisals
index 331f538..098ffd4 100644
--- a/Appraisals
+++ b/Appraisals
@@ -3,14 +3,11 @@
 # Supported versions of Rails:
 # https://endoflife.date/rails
 #
-appraise "activejob-6.0" do
-  gem "activejob", "~> 6.0.x"
-  gem "activesupport", "~> 6.0.x"
-end
-
 appraise "activejob-6.1" do
   gem "activejob", "~> 6.1.x"
   gem "activesupport", "~> 6.1.x"
+  gem "base64"
+  gem "bigdecimal"
 end
 
 appraise "activejob-7.0" do