diff --git a/requirements.txt b/requirements.txt
index a9ed29486b3..e34f6f148b1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,4 +15,4 @@ sklearn >= 0.0              # for st test
 pandas >= 1.0.2             # for ut test
 bs4
 astunparse
-packaging
+packaging >= 20.0
diff --git a/setup.py b/setup.py
index 64a139f2579..c746c54c3df 100644
--- a/setup.py
+++ b/setup.py
@@ -119,7 +119,7 @@ required_package = [
     'cffi >= 1.13.2',
     'decorator >= 4.4.0',
     'astunparse >= 1.6.3',
-    'packaging'
+    'packaging >= 20.0'
 ]
 
 package_data = {