diff --git a/javamelody-core/src/main/java/net/bull/javamelody/internal/web/PrometheusController.java b/javamelody-core/src/main/java/net/bull/javamelody/internal/web/PrometheusController.java
index <HASH>..<HASH> 100644
--- a/javamelody-core/src/main/java/net/bull/javamelody/internal/web/PrometheusController.java
+++ b/javamelody-core/src/main/java/net/bull/javamelody/internal/web/PrometheusController.java
@@ -20,8 +20,10 @@ package net.bull.javamelody.internal.web;
 import java.io.IOException;

 import java.io.PrintWriter;

 import java.text.DecimalFormat;

+import java.text.DecimalFormatSymbols;

 import java.util.Collection;

 import java.util.List;

+import java.util.Locale;

 

 import net.bull.javamelody.Parameter;

 import net.bull.javamelody.internal.model.CacheInformations;

@@ -155,6 +157,7 @@ class PrometheusController {
 	private static final DecimalFormat DECIMAL_FORMAT = new DecimalFormat();

 

 	static {

+		DECIMAL_FORMAT.setDecimalFormatSymbols(DecimalFormatSymbols.getInstance(Locale.US));

 		DECIMAL_FORMAT.setGroupingUsed(false);

 		DECIMAL_FORMAT.setMinimumIntegerDigits(1);

 		DECIMAL_FORMAT.setMaximumFractionDigits(15);
number format always with point as decimal separator