diff --git a/modules/openapi-generator/src/main/resources/php-symfony/composer.mustache b/modules/openapi-generator/src/main/resources/php-symfony/composer.mustache
index 69ac276f6c1e..3c623d307b53 100644
--- a/modules/openapi-generator/src/main/resources/php-symfony/composer.mustache
+++ b/modules/openapi-generator/src/main/resources/php-symfony/composer.mustache
@@ -25,7 +25,7 @@
         "ext-mbstring": "*",
         "symfony/validator": "*",
         "jms/serializer-bundle": "*",
-        "symfony/framework-bundle": "^2.3|^3.0"
+        "symfony/framework-bundle": "^2.3|^3.0|^4.1"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.8",
diff --git a/modules/openapi-generator/src/main/resources/php-symfony/services.mustache b/modules/openapi-generator/src/main/resources/php-symfony/services.mustache
index 6d61563c32d6..f28cde4d73f8 100644
--- a/modules/openapi-generator/src/main/resources/php-symfony/services.mustache
+++ b/modules/openapi-generator/src/main/resources/php-symfony/services.mustache
@@ -14,10 +14,10 @@ services:
         class: {{modelPackage}}\ModelSerializer
 
     {{bundleAlias}}.service.serializer:
-        class: %{{bundleAlias}}.serializer%
+        class: '%{{bundleAlias}}.serializer%'
 
     {{bundleAlias}}.service.validator:
-        class: %{{bundleAlias}}.validator%
+        class: '%{{bundleAlias}}.validator%'
 
 {{#apiInfo}}
 {{#apis}}
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Resources/config/services.yml b/samples/server/petstore/php-symfony/SymfonyBundle-php/Resources/config/services.yml
index f40b2d5104d3..9e514b20a046 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Resources/config/services.yml
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Resources/config/services.yml
@@ -14,10 +14,10 @@ services:
         class: OpenAPI\Server\Model\ModelSerializer
 
     open_apiserver.service.serializer:
-        class: %open_apiserver.serializer%
+        class: '%open_apiserver.serializer%'
 
     open_apiserver.service.validator:
-        class: %open_apiserver.validator%
+        class: '%open_apiserver.validator%'
 
     open_apiserver.controller.pet:
         class: OpenAPI\Server\Controller\PetController
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/composer.json b/samples/server/petstore/php-symfony/SymfonyBundle-php/composer.json
index c8d0976f8454..51c7a53bbc32 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/composer.json
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/composer.json
@@ -22,7 +22,7 @@
         "ext-mbstring": "*",
         "symfony/validator": "*",
         "jms/serializer-bundle": "*",
-        "symfony/framework-bundle": "^2.3|^3.0"
+        "symfony/framework-bundle": "^2.3|^3.0|^4.1"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.8",