diff --git a/data/fields/population.json b/data/fields/population.json
index 9279162a..74a231f8 100644
--- a/data/fields/population.json
+++ b/data/fields/population.json
@@ -1,5 +1,6 @@
 {
     "key": "population",
-    "type": "text",
+    "type": "number",
+    "minValue": 0,
     "label": "Population"
 }