Index: branches/5.2.x/composer.json
===================================================================
diff -u -r16792 -r16822
--- branches/5.2.x/composer.json	(.../composer.json)	(revision 16792)
+++ branches/5.2.x/composer.json	(.../composer.json)	(revision 16822)
@@ -9,7 +9,7 @@
 	"require-dev": {
 		"behat/mink": "^1.7",
 		"aik099/phpunit-mink": "^2.4",
-		"yoast/phpunit-polyfills": "^1.1",
+		"yoast/phpunit-polyfills": "^2.0",
 		"qa-tools/qa-tools": "^1.2",
 		"phpspec/prophecy": "^1.10",
 		"aik099/coding-standard": "dev-in-portal"