diff --git a/src/helma/extensions/HelmaExtension.java b/src/helma/extensions/HelmaExtension.java
index 5750e65c..9c02c7f5 100644
--- a/src/helma/extensions/HelmaExtension.java
+++ b/src/helma/extensions/HelmaExtension.java
@@ -32,6 +32,12 @@ public abstract class HelmaExtension {
 	  */
 	public abstract void applicationStopped (Application app);
 
+	/**
+	  * called when an Application's properties are have been updated.
+	  * note that this will be called at startup once *before* applicationStarted().
+	  */
+	public abstract void applicationUpdated (Application app);
+
 	/**
 	  * called by the ScriptingEngine when it is initizalized. Throws a ConfigurationException
 	  * when this type of ScriptingEngine is not supported. New methods and prototypes can be
diff --git a/src/helma/extensions/demo/DemoExtension.java b/src/helma/extensions/demo/DemoExtension.java
index 0d1d9455..2a946e06 100644
--- a/src/helma/extensions/demo/DemoExtension.java
+++ b/src/helma/extensions/demo/DemoExtension.java
@@ -43,6 +43,10 @@ public class DemoExtension extends HelmaExtension {
 	app.logEvent ("DemoExtension stopped on app " + app.getName () );
 	}
 
+	public void applicationUpdated (Application app) {
+	app.logEvent ("DemoExtension updated on app " + app.getName () );
+	}
+
 	public HashMap initScripting (Application app, ScriptingEngine engine) throws ConfigurationException {
 	if (!(engine instanceof FesiEngine))
 	    throw new ConfigurationException ("scripting engine " + engine.toString () + " not supported in DemoExtension");
diff --git a/src/helma/framework/core/Application.java b/src/helma/framework/core/Application.java
index 169e137c..89fe19aa 100644
--- a/src/helma/framework/core/Application.java
+++ b/src/helma/framework/core/Application.java
@@ -1252,6 +1252,14 @@ public final class Application implements IPathElement, Runnable {
 	    // if node manager exists, update it
 	    if (nmgr != null)
 	        nmgr.updateProperties (props);
+	    // update extensions
+	    Vector extensions = Server.getServer ().getExtensions ();
+	    for (int i=0; i<extensions.size(); i++) {
+	        HelmaExtension ext = (HelmaExtension)extensions.get(i);
+	        try {
+	            ext.applicationUpdated (this);
+	        } catch (ConfigurationException e) { }
+	    }
 	    // set prop read timestamp
 	    lastPropertyRead = props.lastModified ();
 	}