diff --git a/composer.json b/composer.json
index 08e49b8b..14cc8837 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
 	"require": {
 		"php": "^7.1",
 		"data-values/data-values": "~0.1|~1.0|~2.0",
-		"wikimedia/assert": "~0.2.2|~0.3.0|~0.4.0"
+		"wikimedia/assert": "~0.2.2|~0.3.0|~0.4.0|~0.5.0"
 	},
 	"require-dev": {
 		"ockcyp/covers-validator": "~1.1",