diff --git a/tests/system-test/0-others/udfpy_main.py b/tests/system-test/0-others/udfpy_main.py
index c6b2af0f83..916b032edb 100644
--- a/tests/system-test/0-others/udfpy_main.py
+++ b/tests/system-test/0-others/udfpy_main.py
@@ -419,7 +419,7 @@ class TDTestCase:
         tdLog.info("install taospyudf...")
         packs = ["taospyudf"]
         for pack in packs:
-            subprocess.check_call([sys.executable, '-m', 'pip', 'install', pack])
+            subprocess.check_call([sys.executable, '-m', 'pip', 'install', '-i', 'https://pypi.org/simple', '-U', pack])
         tdLog.info("call ldconfig...")
         os.system("ldconfig")
         tdLog.info("install taospyudf successfully.")
@@ -461,4 +461,4 @@ class TDTestCase:
         tdLog.success("%s successfully executed" % __file__)
 
 tdCases.addWindows(__file__, TDTestCase())
-tdCases.addLinux(__file__, TDTestCase())
\ No newline at end of file
+tdCases.addLinux(__file__, TDTestCase())