diff --git a/package.json b/package.json
index 08a5b36..ad13560 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "typescript": "^3.4.5"
   },
   "peerDependencies": {
-    "prom-client": "^13.0.0"
+    "prom-client": ">=12.0.0"
   },
   "repository": {
     "type": "git",