diff --git a/dimensions/overworld.json b/dimensions/overworld.json
index 4a62ee07..fd249bfe 100644
--- a/dimensions/overworld.json
+++ b/dimensions/overworld.json
@@ -63,7 +63,9 @@
             "canBreakSurface": false,
             "fluid": {
                 "fluidHeight": 22,
-                "fluidType": "LAVA"
+                "fluidType": {
+                    "block": "lava"
+                }
             },
             "verticalSlope": {
                 "generator": {