diff --git a/composer.json b/composer.json
index 528f508..74aac1b 100644
--- a/composer.json
+++ b/composer.json
@@ -34,7 +34,7 @@
     }
   },
   "require-dev": {
-    "phpunit/phpunit": "^5.5",
-    "mockery/mockery": "^0.9.5"
+    "phpunit/phpunit": "^8",
+    "mockery/mockery": "^1.4"
   }
 }
diff --git a/phpunit.xml b/phpunit.xml
index 59500d1..460aa40 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -8,7 +8,6 @@
          convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
-         syntaxCheck="true"
          verbose="true"
 >
     <testsuites>