diff --git a/composer.json b/composer.json
index d1c2099..c933f5b 100644
--- a/composer.json
+++ b/composer.json
@@ -25,10 +25,12 @@
 		"irc": "irc://irc.freenode.org/mediawiki"
 	},
 	"require": {
-		"mediawiki/mediawiki": ">=1.31",
 		"php": ">=7.0",
 		"composer/installers": "1.*,>=1.0.1"
 	},
+	"conflict": {
+		"mediawiki/mediawiki": "< 1.31"
+	},
 	"extra": {
 		"branch-alias": {
 			"dev-master": "1.x-dev"