diff --git a/impl/src/main/java/org/apache/myfaces/view/facelets/tag/jstl/core/JstlCoreLibrary.java b/impl/src/main/java/org/apache/myfaces/view/facelets/tag/jstl/core/JstlCoreLibrary.java
index 236109b..d50d5c8 100644
--- a/impl/src/main/java/org/apache/myfaces/view/facelets/tag/jstl/core/JstlCoreLibrary.java
+++ b/impl/src/main/java/org/apache/myfaces/view/facelets/tag/jstl/core/JstlCoreLibrary.java
@@ -27,7 +27,7 @@
 public final class JstlCoreLibrary extends AbstractTagLibrary
 {
 
-    public final static String Namespace = "http://java.sun.com/jstl/core";
+    public final static String Namespace = "http://java.sun.com/jsp/jstl/core";
 
     public final static JstlCoreLibrary Instance = new JstlCoreLibrary();
 
diff --git a/impl/src/test/resources/org/apache/myfaces/view/facelets/tag/jstl/core/forEach.xml b/impl/src/test/resources/org/apache/myfaces/view/facelets/tag/jstl/core/forEach.xml
index f4e1201..d474e79 100644
--- a/impl/src/test/resources/org/apache/myfaces/view/facelets/tag/jstl/core/forEach.xml
+++ b/impl/src/test/resources/org/apache/myfaces/view/facelets/tag/jstl/core/forEach.xml
@@ -17,7 +17,7 @@
 <html xmlns="http://www.w3.org/1999/xhtml"
       xmlns:ui="http://java.sun.com/jsf/facelets"
       xmlns:h="http://java.sun.com/jsf/html"
-      xmlns:c="http://java.sun.com/jstl/core">
+      xmlns:c="http://java.sun.com/jsp/jstl/core">
 <body>
 
 <ui:composition>
diff --git a/impl/src/test/resources/org/apache/myfaces/view/facelets/tag/jstl/core/if.xml b/impl/src/test/resources/org/apache/myfaces/view/facelets/tag/jstl/core/if.xml
index bfb5db8..ef437c0 100644
--- a/impl/src/test/resources/org/apache/myfaces/view/facelets/tag/jstl/core/if.xml
+++ b/impl/src/test/resources/org/apache/myfaces/view/facelets/tag/jstl/core/if.xml
@@ -17,7 +17,7 @@
 <html xmlns="http://www.w3.org/1999/xhtml"
       xmlns:ui="http://java.sun.com/jsf/facelets"
       xmlns:h="http://java.sun.com/jsf/html"
-      xmlns:c="http://java.sun.com/jstl/core">
+      xmlns:c="http://java.sun.com/jsp/jstl/core">
 <body>
 
 <ui:composition>