diff --git a/pg_stat_monitor--1.0--2.0.sql b/pg_stat_monitor--1.0--2.0.sql
index 18d28b1..dbfc8bb 100644
--- a/pg_stat_monitor--1.0--2.0.sql
+++ b/pg_stat_monitor--1.0--2.0.sql
@@ -271,6 +271,11 @@ $$
 $$ LANGUAGE plpgsql;
 
 SELECT pgsm_create_view();
+REVOKE ALL ON FUNCTION range FROM PUBLIC;
+REVOKE ALL ON FUNCTION get_cmd_type FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_stat_monitor_settings FROM PUBLIC;
+REVOKE ALL ON FUNCTION decode_error_level FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_stat_monitor_internal FROM PUBLIC;
 
 GRANT SELECT ON pg_stat_monitor TO PUBLIC;
 
diff --git a/pg_stat_monitor--1.0.sql b/pg_stat_monitor--1.0.sql
index 1e4e0f9..0321479 100644
--- a/pg_stat_monitor--1.0.sql
+++ b/pg_stat_monitor--1.0.sql
@@ -387,5 +387,12 @@ $$ LANGUAGE plpgsql;
 
 SELECT pgsm_create_view();
 
+REVOKE ALL ON FUNCTION range FROM PUBLIC;
+REVOKE ALL ON FUNCTION get_state FROM PUBLIC;
+REVOKE ALL ON FUNCTION get_cmd_type FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_stat_monitor_settings FROM PUBLIC;
+REVOKE ALL ON FUNCTION decode_error_level FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_stat_monitor_internal FROM PUBLIC;
+
 GRANT SELECT ON pg_stat_monitor TO PUBLIC;
 
diff --git a/pg_stat_monitor--2.0.sql b/pg_stat_monitor--2.0.sql
index b2eb83a..339469a 100644
--- a/pg_stat_monitor--2.0.sql
+++ b/pg_stat_monitor--2.0.sql
@@ -366,6 +366,11 @@ $$
 $$ LANGUAGE plpgsql;
 
 SELECT pgsm_create_view();
+REVOKE ALL ON FUNCTION range FROM PUBLIC;
+REVOKE ALL ON FUNCTION get_cmd_type FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_stat_monitor_settings FROM PUBLIC;
+REVOKE ALL ON FUNCTION decode_error_level FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_stat_monitor_internal FROM PUBLIC;
 
 GRANT SELECT ON pg_stat_monitor TO PUBLIC;