diff --git a/src/main/java/org/eclipse/yasson/internal/serializer/AbstractNumberDeserializer.java b/src/main/java/org/eclipse/yasson/internal/serializer/AbstractNumberDeserializer.java
index 283a64280..ee061aa7f 100644
--- a/src/main/java/org/eclipse/yasson/internal/serializer/AbstractNumberDeserializer.java
+++ b/src/main/java/org/eclipse/yasson/internal/serializer/AbstractNumberDeserializer.java
@@ -22,6 +22,7 @@
 import java.text.DecimalFormat;
 import java.text.NumberFormat;
 import java.text.ParseException;
+import java.util.Locale;
 import java.util.Optional;
 
 /**
@@ -49,9 +50,10 @@ protected final Optional<Number> deserializeFormatted(String jsonValue, boolean
 
         final JsonbNumberFormatter numberFormat = getCustomization().getDeserializeNumberFormatter();
         //consider synchronizing on format instance or per thread cache.
-        final NumberFormat format = NumberFormat.getInstance(jsonbContext.getConfigProperties().getLocale(numberFormat.getLocale()));
+        final NumberFormat format = NumberFormat.getInstance((Locale.ENGLISH));
         ((DecimalFormat)format).applyPattern(numberFormat.getFormat());
         format.setParseIntegerOnly(integerOnly);
+        format.setGroupingUsed(false);
         try {
             return Optional.of(format.parse(jsonValue));
         } catch (ParseException e) {
diff --git a/src/main/java/org/eclipse/yasson/internal/serializer/AbstractNumberSerializer.java b/src/main/java/org/eclipse/yasson/internal/serializer/AbstractNumberSerializer.java
index 88c0082ea..177e55cfa 100644
--- a/src/main/java/org/eclipse/yasson/internal/serializer/AbstractNumberSerializer.java
+++ b/src/main/java/org/eclipse/yasson/internal/serializer/AbstractNumberSerializer.java
@@ -19,6 +19,7 @@
 import javax.json.stream.JsonGenerator;
 import java.text.DecimalFormat;
 import java.text.NumberFormat;
+import java.util.Locale;
 
 /**
  * Common serializer for numbers, using number format.
@@ -52,8 +53,9 @@ public AbstractNumberSerializer(Customization customization) {
     @Override
     protected void serialize(T obj, JsonGenerator generator, Marshaller marshaller) {
         if (formatter != null) {
-            final NumberFormat format = NumberFormat.getInstance(marshaller.getJsonbContext().getConfigProperties().getLocale(formatter.getLocale()));
+            final NumberFormat format = NumberFormat.getInstance(Locale.ENGLISH);
             ((DecimalFormat)format).applyPattern(formatter.getFormat());
+            format.setGroupingUsed(false);
             generator.write(format.format(obj));
         } else {
             serializeNonFormatted(obj, generator);
diff --git a/src/test/java/org/eclipse/yasson/documented/DocumentationExampleTest.java b/src/test/java/org/eclipse/yasson/documented/DocumentationExampleTest.java
index ac4f751e5..d6f7592b1 100644
--- a/src/test/java/org/eclipse/yasson/documented/DocumentationExampleTest.java
+++ b/src/test/java/org/eclipse/yasson/documented/DocumentationExampleTest.java
@@ -358,7 +358,7 @@ public static class Person9 {
         @JsonbDateFormat("dd.MM.yyyy")
         public LocalDate birthDate;
 
-        @JsonbNumberFormat("#0.00")
+        @JsonbNumberFormat(value = "###,##0.00", locale = "de-de")
         public BigDecimal salary;
     }
     
@@ -367,15 +367,15 @@ public void testDateNumberFormats1() {
         Person9 p = new Person9();
         p.name = "Jason Bourne";
         p.birthDate = LocalDate.of(1999, 8, 7);
-        p.salary = new BigDecimal("123.45678");
+        p.salary = new BigDecimal("1234.5678");
         Jsonb jsonb = JsonbBuilder.create();
         String json = jsonb.toJson(p);
-        assertEquals("{\"birthDate\":\"07.08.1999\",\"name\":\"Jason Bourne\",\"salary\":\"123.46\"}", json);
+        assertEquals("{\"birthDate\":\"07.08.1999\",\"name\":\"Jason Bourne\",\"salary\":\"1234.57\"}", json);
         
-        Person9 after = jsonb.fromJson("{\"birthDate\":\"07.08.1999\",\"name\":\"Jason Bourne\",\"salary\":\"123.46\"}", Person9.class);
+        Person9 after = jsonb.fromJson("{\"birthDate\":\"07.08.1999\",\"name\":\"Jason Bourne\",\"salary\":\"1234.57\"}", Person9.class);
         assertEquals(p.name, after.name);
         assertEquals(p.birthDate, after.birthDate);
-        assertEquals(new BigDecimal("123.46"), after.salary);
+        assertEquals(new BigDecimal("1234.57"), after.salary);
     }
     
     public static class Person10 {