diff --git a/src/main/services/database/postgresql.ts b/src/main/services/database/postgresql.ts
index 829785d..79ef9f7 100644
--- a/src/main/services/database/postgresql.ts
+++ b/src/main/services/database/postgresql.ts
@@ -339,7 +339,11 @@ const SQL_KEYWORDS = new Set([
   'IF',
   'CURRENT_TIMESTAMP',
   'NOW',
-  'GETDATE'
+  'GETDATE',
+
+  // ==================== Timezone Expression ====================
+  'AT',
+  'ZONE'
 ])
 
 /**
diff --git a/tests/unit/dialects/postgresql-dialect.test.ts b/tests/unit/dialects/postgresql-dialect.test.ts
index e2f58e1..bbcecb8 100644
--- a/tests/unit/dialects/postgresql-dialect.test.ts
+++ b/tests/unit/dialects/postgresql-dialect.test.ts
@@ -46,8 +46,8 @@ describe('PostgreSqlDialect', () => {
   })
 
   describe('currentTimestamp', () => {
-    it('should return CURRENT_TIMESTAMP', () => {
-      expect(dialect.currentTimestamp()).toBe('CURRENT_TIMESTAMP')
+    it('should return explicit UTC timestamp expression', () => {
+      expect(dialect.currentTimestamp()).toBe("(NOW() AT TIME ZONE 'UTC')")
     })
   })