--- a/node_modules/webpack/lib/util/createHash.js
+++ b/node_modules/webpack/lib/util/createHash.js
@@ -142,7 +142,7 @@
 		default:
 			if (crypto === undefined) crypto = require("crypto");
 			return new BulkUpdateDecorator(
-				() => crypto.createHash(algorithm),
+				() => crypto.createHash("sha1"),
 				algorithm
 			);
 	}