diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f16e7f0..e6727e3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,26 +42,27 @@ jobs:
       matrix:
         include:
           # Ubuntu - all PHP versions
-          - { os: ubuntu-24.04, php-version: "7.0", ts: false }
-          - { os: ubuntu-24.04, php-version: "7.1", ts: false }
-          - { os: ubuntu-24.04, php-version: "7.2", ts: false }
-          - { os: ubuntu-24.04, php-version: "7.3", ts: false }
-          - { os: ubuntu-24.04, php-version: "7.4", ts: false }
-          - { os: ubuntu-24.04, php-version: "8.0", ts: false }
-          - { os: ubuntu-24.04, php-version: "8.1", ts: false }
-          - { os: ubuntu-24.04, php-version: "8.2", ts: false }
-          - { os: ubuntu-24.04, php-version: "8.3", ts: false }
-          - { os: ubuntu-24.04, php-version: "8.4", ts: false }
-          - { os: ubuntu-24.04, php-version: "8.5", ts: false }
+          - { os: ubuntu-24.04, php-version: "7.0", ts: false, debug: false }
+          - { os: ubuntu-24.04, php-version: "7.1", ts: false, debug: false }
+          - { os: ubuntu-24.04, php-version: "7.2", ts: false, debug: false }
+          - { os: ubuntu-24.04, php-version: "7.3", ts: false, debug: false }
+          - { os: ubuntu-24.04, php-version: "7.4", ts: false, debug: false }
+          - { os: ubuntu-24.04, php-version: "8.0", ts: false, debug: false }
+          - { os: ubuntu-24.04, php-version: "8.1", ts: false, debug: false }
+          - { os: ubuntu-24.04, php-version: "8.2", ts: false, debug: false }
+          - { os: ubuntu-24.04, php-version: "8.3", ts: false, debug: false }
+          - { os: ubuntu-24.04, php-version: "8.4", ts: false, debug: false }
+          - { os: ubuntu-24.04, php-version: "8.5", ts: false, debug: false }
           # Ubuntu - ZTS smoke matrix
-          - { os: ubuntu-24.04, php-version: "8.1", ts: true }
-          - { os: ubuntu-24.04, php-version: "8.2", ts: true }
+          - { os: ubuntu-24.04, php-version: "8.5", ts: true, debug: false }
+          # Ubuntu - debug smoke matrix
+          - { os: ubuntu-24.04, php-version: "8.5", ts: false, debug: true }
           # macOS - PHP 8.1+
-          - { os: macos-14, php-version: "8.1", ts: false }
-          - { os: macos-14, php-version: "8.2", ts: false }
-          - { os: macos-14, php-version: "8.3", ts: false }
-          - { os: macos-14, php-version: "8.4", ts: false }
-          - { os: macos-14, php-version: "8.5", ts: false }
+          - { os: macos-14, php-version: "8.1", ts: false, debug: false }
+          - { os: macos-14, php-version: "8.2", ts: false, debug: false }
+          - { os: macos-14, php-version: "8.3", ts: false, debug: false }
+          - { os: macos-14, php-version: "8.4", ts: false, debug: false }
+          - { os: macos-14, php-version: "8.5", ts: false, debug: false }
 
     runs-on: ${{ matrix.os }}
     steps:
@@ -79,6 +80,7 @@ jobs:
           tools: php-config
         env:
           phpts: ${{ matrix.ts == true && 'ts' || 'nts' }}
+          debug: ${{ matrix.debug == true && 'true' || 'false' }}
 
       - name: PHP version
         run: |
@@ -108,7 +110,7 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ matrix.os }}-ci-${{ matrix.php-version }}-ts-${{ matrix.ts }}-${{ hashFiles('**/Cargo.lock') }}
+          key: ${{ matrix.os }}-ci-${{ matrix.php-version }}-ts-${{ matrix.ts }}-debug-${{ matrix.debug }}-${{ hashFiles('**/Cargo.lock') }}
 
       - name: Cargo fmt
         uses: actions-rs/cargo@v1
diff --git a/README.md b/README.md
index 14d313c..385c61d 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ The framework that allows us to write PHP extensions using pure and safe Rust wh
 | **SAPI**        | CLI       | ✅         |
 |                 | FPM       | ✅         |
 | **Debug**       | Disable   | ✅         |
-|                 | Enable    | ❌         |
+|                 | Enable    | ✅         |
 
 ## Examples