diff --git a/src/java/com/threerings/cast/bundle/tools/ComponentBundlerTask.java b/src/java/com/threerings/cast/bundle/tools/ComponentBundlerTask.java
index 0fa5f38fb..c2a261f9f 100644
--- a/src/java/com/threerings/cast/bundle/tools/ComponentBundlerTask.java
+++ b/src/java/com/threerings/cast/bundle/tools/ComponentBundlerTask.java
@@ -1,5 +1,5 @@
 //
-// $Id: ComponentBundlerTask.java,v 1.18 2003/01/13 22:53:04 mdb Exp $
+// $Id: ComponentBundlerTask.java,v 1.19 2003/06/17 23:29:33 ray Exp $
 
 package com.threerings.cast.bundle.tools;
 
@@ -26,6 +26,7 @@ import java.util.Iterator;
 
 import java.util.jar.JarOutputStream;
 import java.util.jar.JarEntry;
+import java.util.zip.Deflater;
 
 import org.xml.sax.SAXException;
 import org.apache.commons.digester.Digester;
@@ -156,6 +157,7 @@ public class ComponentBundlerTask extends Task
             // make sure we can create our bundle file
             FileOutputStream fout = new FileOutputStream(_target);
             JarOutputStream jout = new JarOutputStream(fout);
+            jout.setLevel(Deflater.BEST_COMPRESSION);
 
             // we'll fill this with component id to tuple mappings
             HashIntMap mapping = new HashIntMap();
diff --git a/src/java/com/threerings/cast/bundle/tools/MetadataBundlerTask.java b/src/java/com/threerings/cast/bundle/tools/MetadataBundlerTask.java
index 56046e070..b2ead9bb9 100644
--- a/src/java/com/threerings/cast/bundle/tools/MetadataBundlerTask.java
+++ b/src/java/com/threerings/cast/bundle/tools/MetadataBundlerTask.java
@@ -1,5 +1,5 @@
 //
-// $Id: MetadataBundlerTask.java,v 1.3 2002/06/26 23:53:07 mdb Exp $
+// $Id: MetadataBundlerTask.java,v 1.4 2003/06/17 23:29:33 ray Exp $
 
 package com.threerings.cast.bundle.tools;
 
@@ -17,6 +17,7 @@ import java.util.HashMap;
 
 import java.util.jar.JarOutputStream;
 import java.util.jar.JarEntry;
+import java.util.zip.Deflater;
 
 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.Task;
@@ -91,6 +92,7 @@ public class MetadataBundlerTask extends Task
 
             // and create the bundle file
             JarOutputStream jout = new JarOutputStream(fout);
+            jout.setLevel(Deflater.BEST_COMPRESSION);
 
             // throw the serialized actions table in there
             JarEntry aentry = new JarEntry(BundleUtil.ACTIONS_PATH);
diff --git a/src/java/com/threerings/media/tile/bundle/tools/TileSetBundler.java b/src/java/com/threerings/media/tile/bundle/tools/TileSetBundler.java
index 9b4427110..11a38453d 100644
--- a/src/java/com/threerings/media/tile/bundle/tools/TileSetBundler.java
+++ b/src/java/com/threerings/media/tile/bundle/tools/TileSetBundler.java
@@ -1,5 +1,5 @@
 //
-// $Id: TileSetBundler.java,v 1.16 2003/05/13 21:33:58 ray Exp $
+// $Id: TileSetBundler.java,v 1.17 2003/06/17 23:29:33 ray Exp $
 
 package com.threerings.media.tile.bundle.tools;
 
@@ -19,6 +19,7 @@ import java.util.Iterator;
 import java.util.jar.JarEntry;
 import java.util.jar.JarOutputStream;
 import java.util.jar.Manifest;
+import java.util.zip.Deflater;
 
 import org.xml.sax.SAXException;
 
@@ -310,6 +311,7 @@ public class TileSetBundler
         FileOutputStream fout = new FileOutputStream(target);
         Manifest manifest = new Manifest();
         JarOutputStream jar = new JarOutputStream(fout, manifest);
+        jar.setLevel(Deflater.BEST_COMPRESSION);
 
         // create an image provider for loading our tileset images
         SimpleCachingImageProvider improv = new SimpleCachingImageProvider() {