diff --git a/cmd/internal/planetscale_edge_database.go b/cmd/internal/planetscale_edge_database.go
index 30c222e..90b8f39 100644
--- a/cmd/internal/planetscale_edge_database.go
+++ b/cmd/internal/planetscale_edge_database.go
@@ -138,7 +138,7 @@ func getJsonSchemaType(mysqlType string, treatTinyIntAsBoolean bool) PropertyTyp
 	}
 
 	if strings.HasPrefix(mysqlType, "bigint") {
-		return PropertyType{Type: "integer", AirbyteType: "big_integer"}
+		return PropertyType{Type: "string", AirbyteType: "big_integer"}
 	}
 
 	if strings.HasPrefix(mysqlType, "datetime") {
diff --git a/cmd/internal/planetscale_edge_database_test.go b/cmd/internal/planetscale_edge_database_test.go
index a952934..f6107e3 100644
--- a/cmd/internal/planetscale_edge_database_test.go
+++ b/cmd/internal/planetscale_edge_database_test.go
@@ -239,17 +239,17 @@ func TestDiscover_CanPickRightAirbyteType(t *testing.T) {
 		},
 		{
 			MysqlType:      "bigint(16)",
-			JSONSchemaType: "integer",
+			JSONSchemaType: "string",
 			AirbyteType:    "big_integer",
 		},
 		{
 			MysqlType:      "bigint unsigned",
-			JSONSchemaType: "integer",
+			JSONSchemaType: "string",
 			AirbyteType:    "big_integer",
 		},
 		{
 			MysqlType:      "bigint zerofill",
-			JSONSchemaType: "integer",
+			JSONSchemaType: "string",
 			AirbyteType:    "big_integer",
 		},
 		{