diff --git a/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/config/PrometheusGlobalConfig.java b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/config/PrometheusGlobalConfig.java
index 05d1c2b255..eac8074ed3 100644
--- a/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/config/PrometheusGlobalConfig.java
+++ b/sentinel-extension/sentinel-prometheus-metric-exporter/src/main/java/com/alibaba/csp/sentinel/metric/prom/config/PrometheusGlobalConfig.java
@@ -71,6 +71,7 @@ public static String getPromFetchApp() {
             appName = DEFAULT_PROM_APP;
         }
         appName = appName.replaceAll("\\.","_");
+        appName = appName.replaceAll("-","_");
         return appName;
     }