diff --git a/package.json b/package.json
index e7489ef2e..8f3b07235 100644
--- a/package.json
+++ b/package.json
@@ -80,6 +80,7 @@
 		"@types/request-promise-native": "1.0.15",
 		"@types/request-stats": "3.0.0",
 		"@types/rimraf": "2.0.2",
+		"@types/seedrandom": "2.4.28",
 		"@types/sharp": "0.22.1",
 		"@types/showdown": "1.9.2",
 		"@types/speakeasy": "2.0.4",