diff --git a/isee/generation_utils.py b/isee/generation_utils.py
index 2cf0e9b..cf634db 100644
--- a/isee/generation_utils.py
+++ b/isee/generation_utils.py
@@ -9,7 +9,8 @@
 import os
 import re
 from functools import partial
-from packaging.version import parse
+from warnings import warn
+
 import semver
 from epythet.autogen import make_autodocs
 from epythet.setup_docsrc import make_docsrc