diff --git a/package.json b/package.json
index 0ce3c86..de73484 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
 		"uglify-js": "3.4.9"
 	},
 	"peerDependencies": {
-		"leaflet": "^1.6.0"
+		"leaflet": "^1.3.1"
 	},
 	"main": "dist/leaflet.markercluster-src.js",
 	"style": "dist/MarkerCluster.css",