diff --git a/modules/openapi-generator/src/main/resources/php-slim-server/composer.mustache b/modules/openapi-generator/src/main/resources/php-slim-server/composer.mustache
index 66eca2a3088..90e61d50f0f 100644
--- a/modules/openapi-generator/src/main/resources/php-slim-server/composer.mustache
+++ b/modules/openapi-generator/src/main/resources/php-slim-server/composer.mustache
@@ -7,6 +7,7 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^4.8",
+    "overtrue/phplint": "^1.0",
     "squizlabs/php_codesniffer": "^3.0"
   },
   "autoload": {
diff --git a/samples/server/petstore-security-test/php-slim/composer.json b/samples/server/petstore-security-test/php-slim/composer.json
index 55c9498f40c..1c4e6a790f8 100644
--- a/samples/server/petstore-security-test/php-slim/composer.json
+++ b/samples/server/petstore-security-test/php-slim/composer.json
@@ -7,6 +7,7 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^4.8",
+    "overtrue/phplint": "^1.0",
     "squizlabs/php_codesniffer": "^3.0"
   },
   "autoload": {
diff --git a/samples/server/petstore/php-slim/composer.json b/samples/server/petstore/php-slim/composer.json
index 55c9498f40c..1c4e6a790f8 100644
--- a/samples/server/petstore/php-slim/composer.json
+++ b/samples/server/petstore/php-slim/composer.json
@@ -7,6 +7,7 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^4.8",
+    "overtrue/phplint": "^1.0",
     "squizlabs/php_codesniffer": "^3.0"
   },
   "autoload": {