diff --git a/migrations/002-listener-statistics.sql b/migrations/002-listener-statistics.sql
index 94cd727..d03ef9b 100644
--- a/migrations/002-listener-statistics.sql
+++ b/migrations/002-listener-statistics.sql
@@ -72,7 +72,7 @@ CREATE TABLE IF NOT EXISTS listener_geo_stats (
     city VARCHAR(100),
     listener_count INTEGER DEFAULT 0,
     listen_minutes INTEGER DEFAULT 0,
-    UNIQUE(date, country_code)
+    UNIQUE(date, country_code, city)
 );
 
 CREATE INDEX IF NOT EXISTS idx_geo_stats_date ON listener_geo_stats(date);