diff --git a/security/src/main/java/org/springframework/ws/soap/security/xwss/callback/DefaultTimestampValidator.java b/security/src/main/java/org/springframework/ws/soap/security/xwss/callback/DefaultTimestampValidator.java
index e4adc4af..074c6ef4 100644
--- a/security/src/main/java/org/springframework/ws/soap/security/xwss/callback/DefaultTimestampValidator.java
+++ b/security/src/main/java/org/springframework/ws/soap/security/xwss/callback/DefaultTimestampValidator.java
@@ -87,7 +87,7 @@ public class DefaultTimestampValidator implements TimestampValidationCallback.Ti
 
     private Date parseDate(String date) throws TimestampValidationCallback.TimestampValidationException {
         SimpleDateFormat calendarFormatter1 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
-        SimpleDateFormat calendarFormatter2 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'.'sss'Z'");
+        SimpleDateFormat calendarFormatter2 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'.'SSS'Z'");
 
         try {
             try {