diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index e3afaf0..96e88b0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: ['7.1', '7.2', '7.3', '7.4', '8.0']
+        php-version: ['7.2', '7.3', '7.4', '8.0']
     steps:
       - name: Check out code into the workspace
         uses: actions/checkout@v2
diff --git a/composer.json b/composer.json
index db1c10a..09c9dcd 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
         }
     },
     "require": {
-        "php": ">=7.1.0",
+        "php": ">=7.2.0",
         "psr/http-client": "^1.0",
         "psr/http-message": "^1.0",
         "php-http/httplug": "^1.0 || ^2.0"
@@ -32,7 +32,7 @@
         "dealerdirect/phpcodesniffer-composer-installer": "^0.7.1",
         "phpcompatibility/php-compatibility": "^9.3",
         "phpstan/phpstan": "^0.12.87",
-        "jms/serializer": "^3.12",
+        "jms/serializer": "^2 | ^3.12",
         "symfony/phpunit-bridge": "^5.2",
         "symfony/var-dumper": "^5.2",
         "symfony/serializer": "^5.2",
diff --git a/src/Client.php b/src/Client.php
index 1aea0e9..500a759 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category Client
  * @package  Pock
diff --git a/src/Creator/AbstractJmsSerializerCreator.php b/src/Creator/AbstractJmsSerializerCreator.php
index 0e68cf3..b00743f 100644
--- a/src/Creator/AbstractJmsSerializerCreator.php
+++ b/src/Creator/AbstractJmsSerializerCreator.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category AbstractJmsSerializerCreator
  * @package  Pock\Creator
diff --git a/src/Creator/JmsJsonSerializerCreator.php b/src/Creator/JmsJsonSerializerCreator.php
index 62e1095..4194242 100644
--- a/src/Creator/JmsJsonSerializerCreator.php
+++ b/src/Creator/JmsJsonSerializerCreator.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category JmsJsonSerializerCreator
  * @package  Pock\Creator
diff --git a/src/Creator/JmsXmlSerializerCreator.php b/src/Creator/JmsXmlSerializerCreator.php
index c0f642d..a310764 100644
--- a/src/Creator/JmsXmlSerializerCreator.php
+++ b/src/Creator/JmsXmlSerializerCreator.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category JmsXmlSerializerCreator
  * @package  Pock\Creator
diff --git a/src/Creator/SerializerCreatorInterface.php b/src/Creator/SerializerCreatorInterface.php
index a658b4a..13035fa 100644
--- a/src/Creator/SerializerCreatorInterface.php
+++ b/src/Creator/SerializerCreatorInterface.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category SerializerCreatorInterface
  * @package  Pock\Creator
diff --git a/src/Enum/RequestMethod.php b/src/Enum/RequestMethod.php
index 06289a5..c82b85b 100644
--- a/src/Enum/RequestMethod.php
+++ b/src/Enum/RequestMethod.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category RequestMethod
  * @package  Pock\Enum
diff --git a/src/Enum/RequestScheme.php b/src/Enum/RequestScheme.php
index e61fb9b..9ee3268 100644
--- a/src/Enum/RequestScheme.php
+++ b/src/Enum/RequestScheme.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category RequestScheme
  * @package  Pock\Enum
diff --git a/src/Exception/BrokenMockException.php b/src/Exception/BrokenMockException.php
index 1949652..68a59fd 100644
--- a/src/Exception/BrokenMockException.php
+++ b/src/Exception/BrokenMockException.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category BrokenMockException
  * @package  Pock\Exception
diff --git a/src/Exception/UniversalMockException.php b/src/Exception/UniversalMockException.php
index a035305..d629536 100644
--- a/src/Exception/UniversalMockException.php
+++ b/src/Exception/UniversalMockException.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category UniversalMockException
  * @package  Pock\Exception
@@ -26,12 +26,13 @@ class UniversalMockException extends Exception implements
     NetworkExceptionInterface,
     RequestExceptionInterface
 {
+    /** @var mixed */
     private $request;
 
     /**
      * UniversalMockException constructor.
      *
-     * @param $request
+     * @param mixed $request
      */
     public function __construct($request)
     {
diff --git a/src/Exception/UnsupportedRequestException.php b/src/Exception/UnsupportedRequestException.php
index 4ba031d..e158f87 100644
--- a/src/Exception/UnsupportedRequestException.php
+++ b/src/Exception/UnsupportedRequestException.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category UnsupportedRequestException
  * @package  Pock\Exception
diff --git a/src/Factory/AbstractSerializerFactory.php b/src/Factory/AbstractSerializerFactory.php
index f5bc278..f706e85 100644
--- a/src/Factory/AbstractSerializerFactory.php
+++ b/src/Factory/AbstractSerializerFactory.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category AbstractSerializerFactory
  * @package  Pock\Factory
diff --git a/src/Factory/JsonSerializerFactory.php b/src/Factory/JsonSerializerFactory.php
index 0189747..e865ebd 100644
--- a/src/Factory/JsonSerializerFactory.php
+++ b/src/Factory/JsonSerializerFactory.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category JsonSerializerFactory
  * @package  Pock\Factory
diff --git a/src/Factory/XmlSerializerFactory.php b/src/Factory/XmlSerializerFactory.php
index 89ae758..9b01475 100644
--- a/src/Factory/XmlSerializerFactory.php
+++ b/src/Factory/XmlSerializerFactory.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category XmlSerializerFactory
  * @package  Pock\Factory
diff --git a/src/Matchers/AnyRequestMatcher.php b/src/Matchers/AnyRequestMatcher.php
index 4984d45..31e09ad 100644
--- a/src/Matchers/AnyRequestMatcher.php
+++ b/src/Matchers/AnyRequestMatcher.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category AnyRequestMatcher
  * @package  Pock\Matchers
diff --git a/src/Matchers/HostMatcher.php b/src/Matchers/HostMatcher.php
index c71a977..12d0a9c 100644
--- a/src/Matchers/HostMatcher.php
+++ b/src/Matchers/HostMatcher.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category HostMatcher
  * @package  Pock\Matchers
diff --git a/src/Matchers/MultipleMatcher.php b/src/Matchers/MultipleMatcher.php
index 04a1bca..d02c77e 100644
--- a/src/Matchers/MultipleMatcher.php
+++ b/src/Matchers/MultipleMatcher.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category MultipleMatcher
  * @package  Pock\Matchers
diff --git a/src/Matchers/RequestMatcherInterface.php b/src/Matchers/RequestMatcherInterface.php
index 4e7b1af..c9692f6 100644
--- a/src/Matchers/RequestMatcherInterface.php
+++ b/src/Matchers/RequestMatcherInterface.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category RequestMatcherInterface
  * @package  Pock\Matchers
diff --git a/src/Matchers/SchemeMatcher.php b/src/Matchers/SchemeMatcher.php
index 399227c..678e347 100644
--- a/src/Matchers/SchemeMatcher.php
+++ b/src/Matchers/SchemeMatcher.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category SchemeMatcher
  * @package  Pock\Matchers
diff --git a/src/Matchers/UriMatcher.php b/src/Matchers/UriMatcher.php
index 2684af4..bdae9f7 100644
--- a/src/Matchers/UriMatcher.php
+++ b/src/Matchers/UriMatcher.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category UriMatcher
  * @package  Pock\Matchers
diff --git a/src/Mock.php b/src/Mock.php
index 101ead7..e8ed880 100644
--- a/src/Mock.php
+++ b/src/Mock.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category Mock
  * @package  Pock
diff --git a/src/MockInterface.php b/src/MockInterface.php
index 31e6833..c0cc2ca 100644
--- a/src/MockInterface.php
+++ b/src/MockInterface.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category MockInterface
  * @package  Pock
diff --git a/src/PockBuilder.php b/src/PockBuilder.php
index 075602d..74458a9 100644
--- a/src/PockBuilder.php
+++ b/src/PockBuilder.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category PockBuilder
  * @package  Pock
diff --git a/src/Promise/HttpRejectedPromise.php b/src/Promise/HttpRejectedPromise.php
index 0a36c51..8029191 100644
--- a/src/Promise/HttpRejectedPromise.php
+++ b/src/Promise/HttpRejectedPromise.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category HttpRejectedPromise
  * @package  Pock\Promise
diff --git a/src/Serializer/JmsSerializerDecorator.php b/src/Serializer/JmsSerializerDecorator.php
index 565cca9..5f84008 100644
--- a/src/Serializer/JmsSerializerDecorator.php
+++ b/src/Serializer/JmsSerializerDecorator.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category JmsSerializerDecorator
  * @package  Pock\Serializer
diff --git a/src/Serializer/SerializerInterface.php b/src/Serializer/SerializerInterface.php
index 7080a22..2de768b 100644
--- a/src/Serializer/SerializerInterface.php
+++ b/src/Serializer/SerializerInterface.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category SerializerInterface
  * @package  Pock\Serializer
diff --git a/tests/src/Creator/JmsJsonSerializerCreatorTest.php b/tests/src/Creator/JmsJsonSerializerCreatorTest.php
index b87474a..71a89e9 100644
--- a/tests/src/Creator/JmsJsonSerializerCreatorTest.php
+++ b/tests/src/Creator/JmsJsonSerializerCreatorTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category JmsJsonSerializerCreatorTest
  * @package  src\Component\Creator
diff --git a/tests/src/Creator/JmsXmlSerializerCreatorTest.php b/tests/src/Creator/JmsXmlSerializerCreatorTest.php
index 073569d..cc93f79 100644
--- a/tests/src/Creator/JmsXmlSerializerCreatorTest.php
+++ b/tests/src/Creator/JmsXmlSerializerCreatorTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category JmsXmlSerializerCreator
  * @package  src\Component\Creator
diff --git a/tests/src/Factory/JsonSerializerFactoryTest.php b/tests/src/Factory/JsonSerializerFactoryTest.php
index ead50b4..3981d9d 100644
--- a/tests/src/Factory/JsonSerializerFactoryTest.php
+++ b/tests/src/Factory/JsonSerializerFactoryTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category JsonSerializerFactoryTest
  * @package  Pock\Tests\Factory
diff --git a/tests/src/Factory/XmlSerializerFactoryTest.php b/tests/src/Factory/XmlSerializerFactoryTest.php
index 3884abe..54f4517 100644
--- a/tests/src/Factory/XmlSerializerFactoryTest.php
+++ b/tests/src/Factory/XmlSerializerFactoryTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category XmlSerializerFactoryTest
  * @package  Pock\Tests\Factory
diff --git a/tests/src/Matchers/AbstractRequestMatcherTest.php b/tests/src/Matchers/AbstractRequestMatcherTest.php
index f58d6e3..af5f4c6 100644
--- a/tests/src/Matchers/AbstractRequestMatcherTest.php
+++ b/tests/src/Matchers/AbstractRequestMatcherTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category AbstractRequestMatcherTest
  * @package  Pock\Tests\Matchers
diff --git a/tests/src/Matchers/AnyRequestMatcherTest.php b/tests/src/Matchers/AnyRequestMatcherTest.php
index e0c6d02..c319463 100644
--- a/tests/src/Matchers/AnyRequestMatcherTest.php
+++ b/tests/src/Matchers/AnyRequestMatcherTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category AnyRequestMatcherTest
  * @package  Pock\Tests\Matchers
diff --git a/tests/src/Matchers/HostMatcherTest.php b/tests/src/Matchers/HostMatcherTest.php
index 448fdcb..40a18f3 100644
--- a/tests/src/Matchers/HostMatcherTest.php
+++ b/tests/src/Matchers/HostMatcherTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category HostMatcherTest
  * @package  Pock\Tests\Matchers
diff --git a/tests/src/Matchers/MultipleMatcherTest.php b/tests/src/Matchers/MultipleMatcherTest.php
index 7b792ba..2966053 100644
--- a/tests/src/Matchers/MultipleMatcherTest.php
+++ b/tests/src/Matchers/MultipleMatcherTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category MultipleMatcherTest
  * @package  Pock\Tests\Matchers
diff --git a/tests/src/Matchers/SchemeMatcherTest.php b/tests/src/Matchers/SchemeMatcherTest.php
index 327d018..c308f2a 100644
--- a/tests/src/Matchers/SchemeMatcherTest.php
+++ b/tests/src/Matchers/SchemeMatcherTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category SchemeMatcherTest
  * @package  Pock\Tests\Matchers
diff --git a/tests/src/Matchers/UriMatcherTest.php b/tests/src/Matchers/UriMatcherTest.php
index 16c700e..83b4a6f 100644
--- a/tests/src/Matchers/UriMatcherTest.php
+++ b/tests/src/Matchers/UriMatcherTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category UriMatcherTest
  * @package  Pock\Tests\Matchers
diff --git a/tests/utils/SimpleObject.php b/tests/utils/SimpleObject.php
index 26e23c3..dea6bb5 100644
--- a/tests/utils/SimpleObject.php
+++ b/tests/utils/SimpleObject.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * PHP 7.3
+ * PHP 7.2
  *
  * @category SimpleObject
  * @package  Pock\TestUtils
@@ -27,7 +27,7 @@ class SimpleObject
 </result>
 
 EOF;
-    
+
     /**
      * @var string
      *