diff --git a/package.json b/package.json
index ac194e14..2fc37a76 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "fstream": "1.0.x",
     "tar": "2.1.x",
     "mapnik": "3.4.7",
-    "mapnik-reference": "^8.4.0",
+    "mapnik-reference": "~8.5.0",
     "carto": "0.15.2",
     "tilelive": "~5.9.0",
     "tilelive-bridge": "~1.6.0",