diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 02aae24..d5d2d74 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,11 +18,31 @@ jobs:
         with:
           php-version: '8.4'
           extensions: mbstring
-          coverage: none
+          coverage: pcov
           tools: composer:v2
       - name: Validate composer.json
         run: composer validate --no-check-publish --no-check-lock
       - name: Install dependencies
         run: composer update --prefer-dist --no-progress --no-interaction
-      - name: Run tests
-        run: vendor/bin/phpunit --no-coverage
+      - name: PHPStan
+        run: vendor/bin/phpstan analyse --no-progress --memory-limit=1G
+      - name: Run tests with coverage
+        run: |
+          mkdir -p build
+          vendor/bin/phpunit --coverage-clover=build/coverage.xml
+      - name: Enforce coverage threshold
+        env:
+          COVERAGE_MIN: '75'
+        run: |
+          php -r '
+          $xml = simplexml_load_file("build/coverage.xml");
+          $metrics = $xml->project->metrics;
+          $total = (int) $metrics["statements"];
+          $covered = (int) $metrics["coveredstatements"];
+          $pct = $total > 0 ? 100 * $covered / $total : 0.0;
+          printf("Coverage: %.2f%% (minimum %.2f%%)\n", $pct, (float) getenv("COVERAGE_MIN"));
+          if ($pct < (float) getenv("COVERAGE_MIN")) {
+              fwrite(STDERR, "Coverage below threshold\n");
+              exit(1);
+          }
+          '
diff --git a/composer.json b/composer.json
index b4361af..f50e49d 100755
--- a/composer.json
+++ b/composer.json
@@ -1,25 +1,29 @@
 {
-  "name": "fastd/container",
-  "description": "FastD Container",
-  "type": "library",
-  "keywords": ["FastD", "container"],
-  "license": "MIT",
-  "authors": [
-    {
-      "name": "janhuang",
-      "email": "384099566@qq.com"
+    "name": "fastd/container",
+    "description": "FastD Container",
+    "type": "library",
+    "keywords": [
+        "FastD",
+        "container"
+    ],
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "janhuang",
+            "email": "384099566@qq.com"
+        }
+    ],
+    "require": {
+        "php": ">=8.4",
+        "psr/container": "^2.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^10.0",
+        "phpstan/phpstan": "^1.12.24"
+    },
+    "autoload": {
+        "psr-4": {
+            "FastD\\Container\\": "src"
+        }
     }
-  ],
-  "require": {
-    "php": ">=8.4",
-    "psr/container": "^2.0"
-  },
-  "require-dev": {
-    "phpunit/phpunit": "^10.0"
-  },
-  "autoload": {
-    "psr-4": {
-      "FastD\\Container\\": "src"
-    }
-  }
 }
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..91e6453
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,4 @@
+parameters:
+    level: 5
+    paths:
+        - src
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 31ffb94..4aa465f 100755
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,5 +1,10 @@
 <phpunit colors="true" bootstrap="./vendor/autoload.php">
-    <testsuites>
+    
+  <source>
+    <include>
+      <directory suffix=".php">src</directory>
+    </include>
+  </source><testsuites>
         <testsuite name="Container Testing">
             <directory>tests</directory>
         </testsuite>