diff --git a/README.md b/README.md
index 9897806..df5d3d5 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Get the requested page's views or unique visitors from Plausible Analytics.
 
 ```env
 PORT=3000 # the api port
-METRICS_PORT=9100 # the port on which prometheus metrics are hosted on, endpoint: /metrics
+METRICS_PORT=3001 # the port on which prometheus metrics are hosted on, endpoint: /metrics
 PLAUSIBLE_DOMAIN=plausible.io # the plausible instance domain
 PLAUSIBLE_API_KEY="api_key_goes_here" # your plausible API key
 ALLOWED_ORIGINS="https://example.com" # allowed CORS origins