diff --git a/sql/pg_analytics--0.2.1--0.2.2.sql b/sql/pg_analytics--0.2.1--0.2.2.sql
index 0adbaa0..02aa532 100644
--- a/sql/pg_analytics--0.2.1--0.2.2.sql
+++ b/sql/pg_analytics--0.2.1--0.2.2.sql
@@ -1 +1,8 @@
 \echo Use "ALTER EXTENSION pg_analytics UPDATE TO '0.2.2'" to load this file. \quit
+
+DROP FUNCTION IF EXISTS time_bucket(_bucket_width pg_catalog."interval", _input date);
+DROP FUNCTION IF EXISTS time_bucket(_bucket_width pg_catalog."interval", _input date, _offset pg_catalog."interval");
+DROP FUNCTION IF EXISTS time_bucket(_bucket_width pg_catalog."interval", _input date, _origin date);
+DROP FUNCTION IF EXISTS time_bucket(_bucket_width pg_catalog."interval", _input pg_catalog."timestamp");
+DROP FUNCTION IF EXISTS time_bucket(_bucket_width pg_catalog."interval", _input pg_catalog."timestamp", _origin date);
+DROP FUNCTION IF EXISTS time_bucket(_bucket_width pg_catalog."interval", _input pg_catalog."timestamp", _offset pg_catalog."interval");