diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca01a52f..7478f563 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Fixed
 - fixed typo in virtualmetercarbon.
+- updated database upgrade1.4.0 sql script
 
 ### Removed
 - None.
diff --git a/database/upgrade/upgrade1.4.0.sql b/database/upgrade/upgrade1.4.0.sql
index e96c8794..d1cf3caf 100644
--- a/database/upgrade/upgrade1.4.0.sql
+++ b/database/upgrade/upgrade1.4.0.sql
@@ -50,6 +50,7 @@ WHERE tv.expression_id = te.id ;
 
 DROP TABLE IF EXISTS myems_system_db.tbl_variables;
 DROP TABLE IF EXISTS myems_system_db.tbl_virtual_meters;
+DROP TABLE IF EXISTS myems_system_db.tbl_expressions;
 
 ALTER TABLE myems_system_db.tbl_variables_new RENAME myems_system_db.tbl_variables;
 ALTER TABLE myems_system_db.tbl_virtual_meters_new RENAME myems_system_db.tbl_virtual_meters;