diff --git a/duniter4j-core-shared/src/main/java/org/duniter/core/util/json/JsonAttributeParser.java b/duniter4j-core-shared/src/main/java/org/duniter/core/util/json/JsonAttributeParser.java
index a7e8df9f0744e3dd5cbeb08db9975ba4e10442e6..14febc43184c510816cbb6230a9f2866e5ad120a 100644
--- a/duniter4j-core-shared/src/main/java/org/duniter/core/util/json/JsonAttributeParser.java
+++ b/duniter4j-core-shared/src/main/java/org/duniter/core/util/json/JsonAttributeParser.java
@@ -28,6 +28,7 @@ import org.duniter.core.util.Preconditions;
 import javax.print.DocFlavor;
 import java.math.BigDecimal;
 import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
 import java.text.ParseException;
 import java.util.ArrayList;
 import java.util.List;
@@ -88,7 +89,9 @@ public class JsonAttributeParser<T extends Object> {
             type = Type.DOUBLE;
             this.pattern = Pattern.compile(String.format(REGEX_ATTRIBUTE_NUMERIC_VALUE, attributeName));
             this.decimalFormat = new DecimalFormat();
-            this.decimalFormat.getDecimalFormatSymbols().setDecimalSeparator('.');
+            DecimalFormatSymbols symbols = this.decimalFormat.getDecimalFormatSymbols();
+            symbols.setDecimalSeparator('.');
+            symbols.setGroupingSeparator(',');
         }
         // BigDecimal
         else if (BigDecimal.class.isAssignableFrom(clazz)) {
@@ -96,7 +99,9 @@ public class JsonAttributeParser<T extends Object> {
             this.pattern = Pattern.compile(String.format(REGEX_ATTRIBUTE_NUMERIC_VALUE, attributeName));
             this.decimalFormat = new DecimalFormat();
             this.decimalFormat.setParseBigDecimal(true); // allow big decimal
-            this.decimalFormat.getDecimalFormatSymbols().setDecimalSeparator('.');
+            DecimalFormatSymbols symbols = this.decimalFormat.getDecimalFormatSymbols();
+            symbols.setDecimalSeparator('.');
+            symbols.setGroupingSeparator(',');
         }
         // Boolean
         else if (Boolean.class.isAssignableFrom(clazz)) {