diff --git a/zipcodes.json b/zipcodes.json
index 8670120..38283e2 100644
--- a/zipcodes.json
+++ b/zipcodes.json
@@ -22969,6 +22969,7 @@
     "60428": 1,
     "60429": 1,
     "60430": 1,
+    "60431": 1,
     "60432": 1,
     "60433": 1,
     "60434": 1,