diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ff9ed13c5..c7438b7f2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2]
+        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
         include:
         - os: macos-latest
@@ -40,7 +40,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2]
+        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
         include:
         - os: macos-latest
@@ -65,7 +65,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2]
+        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
         include:
         - os: macos-latest
@@ -92,7 +92,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2]
+        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
     steps:
     - uses: actions/checkout@v3
@@ -108,7 +108,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2]
+        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
     steps:
     - uses: actions/checkout@v3
@@ -124,7 +124,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2]
+        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
     steps:
     - uses: actions/checkout@v3
@@ -140,7 +140,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2]
+        ruby: [ruby-3.0, ruby-3.1.2, ruby-3.1, ruby-3.2, ruby-3.3]
         os: [ubuntu-latest]
     steps:
     - uses: actions/checkout@v3
diff --git a/README.md b/README.md
index 1d3ae5fd3..7bdbb363f 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,7 @@ Supported indicates if a specific Ruby version / Implementation is actively supp
 | cRUBY/MRI      | 3.0            | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
 | cRUBY/MRI      | 3.1            | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
 | cRUBY/MRI      | 3.2            | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
+| cRUBY/MRI      | 3.3            | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
 | jruby          | TBD            | :email:            | :email:            | :email:            | :email:            |
 | mruby          | TBD            | :email:            | :email:            | :email:            | :email:            |
 | cRUBY/MRI      | < 3.0          | :no_entry:         | :no_entry:         | :no_entry:         | :no_entry:         |