diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 06bf278..ee7f0ed 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,6 +25,7 @@ jobs:
         - ubuntu-20.04
         - macos-latest
         ruby:
+        - "3.3"
         - "3.2"
         - "3.1"
         - "3.0"
@@ -42,6 +43,7 @@ jobs:
         - { os: ubuntu-20.04   , ruby: 2.4   , python: "3.x"  , python_architecture: x64 , venv: "" }
 
         # Ruby 2.7 with Each Python 3.x
+        - { os: ubuntu-20.04   , ruby: 2.7   , python: "3.12" , python_architecture: x64 , venv: "" }
         - { os: ubuntu-20.04   , ruby: 2.7   , python: "3.11" , python_architecture: x64 , venv: "" }
         - { os: ubuntu-20.04   , ruby: 2.7   , python: "3.10" , python_architecture: x64 , venv: "" }
         - { os: ubuntu-20.04   , ruby: 2.7   , python: "3.9"  , python_architecture: x64 , venv: "" }
@@ -52,12 +54,12 @@ jobs:
         # Ruby-debug with the latest Python 3
         - { os: ubuntu-20.04   , ruby: debug , python: "3.x"  , python_architecture: x64 , venv: "" }
 
-        # Ruby 3.1 with the latest Python 3 with venv
-        - { os: ubuntu-20.04   , ruby: "3.1" , python: "3.x"  , python_architecture: x64 , venv: "venv:"  }
+        # The latest stable Ruby with the latest Python 3 with venv
+        - { os: ubuntu-20.04   , ruby: "3.3" , python: "3.x"  , python_architecture: x64 , venv: "venv:"  }
 
         # macOS with venv
-        - { os: macos-latest   , ruby: "3.1" , python: "3.x"  , python_architecture: x64 , venv: "venv:"  }
-        - { os: macos-latest   , ruby: "3.1" , python: "3.8"  , python_architecture: x64 , venv: "venv:"  }
+        - { os: macos-latest   , ruby: "3.3" , python: "3.x"  , python_architecture: x64 , venv: "venv:"  }
+        - { os: macos-latest   , ruby: "3.3" , python: "3.8"  , python_architecture: x64 , venv: "venv:"  }
 
         #- { os: macos-latest   , ruby: debug , python: "3.x" , python_architecture: x64 , venv: "" }