diff --git a/assets/psalm-phar/composer.json b/assets/psalm-phar/composer.json
index abf2772b8..56c673658 100644
--- a/assets/psalm-phar/composer.json
+++ b/assets/psalm-phar/composer.json
@@ -5,5 +5,8 @@
 	"require": {
 		"php": "^7.1"
 	},
+	"conflict": {
+		"vimeo/psalm" : "*"
+	},
 	"bin": ["psalm.phar", "psalm", "psalter", "psalm-language-server", "psalm-plugin"]
 }