diff --git a/models/ShipEngine.json b/models/ShipEngine.json
index b5bdb88..a7a0faf 100644
--- a/models/ShipEngine.json
+++ b/models/ShipEngine.json
@@ -21,7 +21,7 @@
       "$ref": "./ShipCondition.json"
     },
     "speed": {
-      "type": "number",
+      "type": "integer",
       "minimum": 1
     },
     "requirements": {
@@ -35,4 +35,4 @@
     "speed",
     "requirements"
   ]
-}
\ No newline at end of file
+}