diff --git a/clusters/tds.json b/clusters/tds.json
index 5865325..5b7658f 100644
--- a/clusters/tds.json
+++ b/clusters/tds.json
@@ -74,6 +74,19 @@
       "uuid": "aa179c37-1a8a-4761-841a-cc940e19d7be",
       "value": "SimpleTDS"
     },
+    {
+      "description": "zTDS is an open source TDS",
+      "meta": {
+        "refs": [
+          "http://ztds.info/doku.php"
+        ],
+        "type": [
+          "OpenSource"
+        ]
+      },
+      "uuid": "7a84de25-545a-4220-b500-85b9219dd67d",
+      "value": "zTDS"
+    },
     {
       "description": "BossTDS",
       "meta": {
@@ -121,5 +134,5 @@
       "value": "Orchid TDS"
     }
   ],
-  "version": 3
+  "version": 4
 }