diff --git a/gns3-qemu.json b/gns3-qemu.json
index ee23ac9..2220094 100644
--- a/gns3-qemu.json
+++ b/gns3-qemu.json
@@ -42,6 +42,13 @@
     }
   ],
   "post-processors": [
+    {
+      "type": "checksum",
+      "checksum_types": [ 
+        "md5" 
+      ],
+      "output": "opennms-horizon/opennms-horizon.qcow2.md5sum"
+    },
     {
       "type": "compress",
       "output": "opennms-horizon/opennms-horizon.qcow2.gz"
@@ -50,9 +57,9 @@
       "type": "shell-local",
       "inline": [
         "cd opennms-horizon", 
+        "mv packer-qemu opennms-horizon.qcow2",
         "md5sum opennms-horizon.qcow2.gz > opennms-horizon.qcow2.gz.md5sum", 
-        "../gns3/create-appliance-file.sh {{user `onms-version`}} > opennms-horizon.log", 
-        "rm packer-qemu"
+        "../gns3/create-appliance-file.sh {{user `onms-version`}} > opennms-horizon.log"
       ]
     }
   ]
diff --git a/gns3/create-appliance-file.sh b/gns3/create-appliance-file.sh
index 9e6552b..a90d09f 100755
--- a/gns3/create-appliance-file.sh
+++ b/gns3/create-appliance-file.sh
@@ -1,8 +1,8 @@
 #!/bin/sh
 
 VERSION="$1"
-MD5SUM="`cat opennms-horizon.qcow2.gz.md5sum | awk '{print $1}'`"
-FILESIZE="`wc -c opennms-horizon.qcow2.gz | awk '{print $1}'`"
+MD5SUM="`cat opennms-horizon.qcow2.md5sum | awk '{print $1}'`"
+FILESIZE="`wc -c opennms-horizon.qcow2 | awk '{print $1}'`"
 
 echo "Creating new opennms-horizon.gns3a appliance file:"
 echo "- OpenNMS version.: $VERSION"
diff --git a/gns3/opennms-horizon.gns3a b/gns3/opennms-horizon.gns3a
index bc05dde..b8113fd 100644
--- a/gns3/opennms-horizon.gns3a
+++ b/gns3/opennms-horizon.gns3a
@@ -6,7 +6,8 @@
     "images": [
         {
             "md5sum": "${md5sum}", 
-            "download_url": "http://opennms.org/opennms-horizon.qcow2", 
+            "direct_download_url": "http://opennms.org/opennms-horizon.qcow2.gz", 
+            "compression": "gzip",
             "filename": "opennms-horizon.qcow2", 
             "version": "${version}", 
             "filesize": ${filesize}