diff --git a/CHANGELOG.md b/CHANGELOG.md
index d2e68704a..1a436e7ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [5.1.1]
 ### Fixed
 - PHP 7.1 compatibility issue: date constants are not available as part of DateTimeInterface before PHP 7.2.0
+- Use Symfony\Contracts\EventDispatcher\Event instead of deprecated Symfony\Component\EventDispatcher\Event
 
 ## [5.1.0]
 ### Fixed
diff --git a/composer.json b/composer.json
index 2ff8c4222..ad2f98421 100755
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "^7.1",
+        "php": "^7.1.3",
         "symfony/event-dispatcher": "^4.3",
         "symfony/cache": "^3.1 || ^4.0",
         "ext-json": "*"
diff --git a/src/Core/Client/Client.php b/src/Core/Client/Client.php
index 99c78264e..719f28055 100755
--- a/src/Core/Client/Client.php
+++ b/src/Core/Client/Client.php
@@ -59,7 +59,6 @@
 use Solarium\QueryType\Terms\Result as TermsResult;
 use Solarium\QueryType\Update\Query\Query as UpdateQuery;
 use Solarium\QueryType\Update\Result as UpdateResult;
-use Symfony\Component\EventDispatcher\Event;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\EventDispatcher\LegacyEventDispatcherProxy;
diff --git a/src/Core/Event/PostCreateQuery.php b/src/Core/Event/PostCreateQuery.php
index 652796a55..f9249b1ec 100644
--- a/src/Core/Event/PostCreateQuery.php
+++ b/src/Core/Event/PostCreateQuery.php
@@ -3,7 +3,7 @@
 namespace Solarium\Core\Event;
 
 use Solarium\Core\Query\QueryInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PostCreateQuery event, see Events for details.
diff --git a/src/Core/Event/PostCreateRequest.php b/src/Core/Event/PostCreateRequest.php
index a002c5de9..500a51b38 100644
--- a/src/Core/Event/PostCreateRequest.php
+++ b/src/Core/Event/PostCreateRequest.php
@@ -4,7 +4,7 @@
 
 use Solarium\Core\Client\Request;
 use Solarium\Core\Query\QueryInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PostCreateRequest event, see Events for details.
diff --git a/src/Core/Event/PostCreateResult.php b/src/Core/Event/PostCreateResult.php
index 9240cda98..62544b2ab 100644
--- a/src/Core/Event/PostCreateResult.php
+++ b/src/Core/Event/PostCreateResult.php
@@ -5,7 +5,7 @@
 use Solarium\Core\Client\Response;
 use Solarium\Core\Query\QueryInterface;
 use Solarium\Core\Query\Result\ResultInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PostCreateResult event, see Events for details.
diff --git a/src/Core/Event/PostExecute.php b/src/Core/Event/PostExecute.php
index da5044bfc..8723365ce 100644
--- a/src/Core/Event/PostExecute.php
+++ b/src/Core/Event/PostExecute.php
@@ -4,7 +4,7 @@
 
 use Solarium\Core\Query\QueryInterface;
 use Solarium\Core\Query\Result\ResultInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PostExecute event, see Events for details.
diff --git a/src/Core/Event/PostExecuteRequest.php b/src/Core/Event/PostExecuteRequest.php
index 85934a02b..439f60e5d 100644
--- a/src/Core/Event/PostExecuteRequest.php
+++ b/src/Core/Event/PostExecuteRequest.php
@@ -5,7 +5,7 @@
 use Solarium\Core\Client\Endpoint;
 use Solarium\Core\Client\Request;
 use Solarium\Core\Client\Response;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PostExecuteRequest event, see Events for details.
diff --git a/src/Core/Event/PreCreateRequest.php b/src/Core/Event/PreCreateRequest.php
index c094c16af..a1ed3b02d 100644
--- a/src/Core/Event/PreCreateRequest.php
+++ b/src/Core/Event/PreCreateRequest.php
@@ -4,7 +4,7 @@
 
 use Solarium\Core\Client\Request;
 use Solarium\Core\Query\QueryInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PreCreateRequest event, see Events for details.
diff --git a/src/Core/Event/PreCreateResult.php b/src/Core/Event/PreCreateResult.php
index 7d67b032f..f76f86327 100644
--- a/src/Core/Event/PreCreateResult.php
+++ b/src/Core/Event/PreCreateResult.php
@@ -5,7 +5,7 @@
 use Solarium\Core\Client\Response;
 use Solarium\Core\Query\QueryInterface;
 use Solarium\Core\Query\Result\ResultInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PreCreateResult event, see Events for details.
diff --git a/src/Core/Event/PreExecute.php b/src/Core/Event/PreExecute.php
index 99eed4fea..35e3dcece 100644
--- a/src/Core/Event/PreExecute.php
+++ b/src/Core/Event/PreExecute.php
@@ -4,7 +4,7 @@
 
 use Solarium\Core\Query\QueryInterface;
 use Solarium\Core\Query\Result\ResultInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PostExecute event, see Events for details.
diff --git a/src/Core/Event/PreExecuteRequest.php b/src/Core/Event/PreExecuteRequest.php
index 4a979b569..e83c0f87e 100644
--- a/src/Core/Event/PreExecuteRequest.php
+++ b/src/Core/Event/PreExecuteRequest.php
@@ -5,7 +5,7 @@
 use Solarium\Core\Client\Endpoint;
 use Solarium\Core\Client\Request;
 use Solarium\Core\Client\Response;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PreExecuteRequest event, see Events for details.
diff --git a/src/Plugin/BufferedAdd/Event/AddDocument.php b/src/Plugin/BufferedAdd/Event/AddDocument.php
index 5d255428a..4fc688441 100644
--- a/src/Plugin/BufferedAdd/Event/AddDocument.php
+++ b/src/Plugin/BufferedAdd/Event/AddDocument.php
@@ -3,7 +3,7 @@
 namespace Solarium\Plugin\BufferedAdd\Event;
 
 use Solarium\Core\Query\DocumentInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * AddDocument event, see Events for details.
diff --git a/src/Plugin/BufferedAdd/Event/PostCommit.php b/src/Plugin/BufferedAdd/Event/PostCommit.php
index 7fe78b746..dceefb98b 100644
--- a/src/Plugin/BufferedAdd/Event/PostCommit.php
+++ b/src/Plugin/BufferedAdd/Event/PostCommit.php
@@ -3,7 +3,7 @@
 namespace Solarium\Plugin\BufferedAdd\Event;
 
 use Solarium\QueryType\Update\Result;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PostCommit event, see Events for details.
diff --git a/src/Plugin/BufferedAdd/Event/PostFlush.php b/src/Plugin/BufferedAdd/Event/PostFlush.php
index d53b80b53..a6c38b717 100644
--- a/src/Plugin/BufferedAdd/Event/PostFlush.php
+++ b/src/Plugin/BufferedAdd/Event/PostFlush.php
@@ -4,7 +4,7 @@
 
 use Solarium\Core\Query\DocumentInterface;
 use Solarium\QueryType\Update\Result;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PostFlush event, see Events for details.
diff --git a/src/Plugin/BufferedAdd/Event/PreCommit.php b/src/Plugin/BufferedAdd/Event/PreCommit.php
index bd376c8d5..a038d3dca 100644
--- a/src/Plugin/BufferedAdd/Event/PreCommit.php
+++ b/src/Plugin/BufferedAdd/Event/PreCommit.php
@@ -3,7 +3,7 @@
 namespace Solarium\Plugin\BufferedAdd\Event;
 
 use Solarium\Core\Query\DocumentInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PreCommit event, see Events for details.
diff --git a/src/Plugin/BufferedAdd/Event/PreFlush.php b/src/Plugin/BufferedAdd/Event/PreFlush.php
index ecd91e99a..f244d5b34 100644
--- a/src/Plugin/BufferedAdd/Event/PreFlush.php
+++ b/src/Plugin/BufferedAdd/Event/PreFlush.php
@@ -3,7 +3,7 @@
 namespace Solarium\Plugin\BufferedAdd\Event;
 
 use Solarium\Core\Query\DocumentInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * PreFlush event, see Events for details.
diff --git a/src/Plugin/Loadbalancer/Event/EndpointFailure.php b/src/Plugin/Loadbalancer/Event/EndpointFailure.php
index 8e4544ac8..ecf595430 100644
--- a/src/Plugin/Loadbalancer/Event/EndpointFailure.php
+++ b/src/Plugin/Loadbalancer/Event/EndpointFailure.php
@@ -4,7 +4,7 @@
 
 use Solarium\Core\Client\Endpoint;
 use Solarium\Exception\HttpException;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * EndpointFailure event, see Events for details.
diff --git a/src/Plugin/ParallelExecution/Event/ExecuteEnd.php b/src/Plugin/ParallelExecution/Event/ExecuteEnd.php
index 57bd712ed..08872eb19 100644
--- a/src/Plugin/ParallelExecution/Event/ExecuteEnd.php
+++ b/src/Plugin/ParallelExecution/Event/ExecuteEnd.php
@@ -2,7 +2,7 @@
 
 namespace Solarium\Plugin\ParallelExecution\Event;
 
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * ExecuteEnd event, see Events for details.
diff --git a/src/Plugin/ParallelExecution/Event/ExecuteStart.php b/src/Plugin/ParallelExecution/Event/ExecuteStart.php
index e3fac1c72..1c5c4c27e 100644
--- a/src/Plugin/ParallelExecution/Event/ExecuteStart.php
+++ b/src/Plugin/ParallelExecution/Event/ExecuteStart.php
@@ -2,7 +2,7 @@
 
 namespace Solarium\Plugin\ParallelExecution\Event;
 
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * ExecuteStart event, see Events for details.