diff --git a/docs/sphinx/source/conf.py b/docs/sphinx/source/conf.py
index a7d5a544..03adb108 100644
--- a/docs/sphinx/source/conf.py
+++ b/docs/sphinx/source/conf.py
@@ -42,9 +42,9 @@ def __getattr__(cls, name):
 MOCK_MODULES = []
 sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)
 """
-# import distutils before calling pd.show_versions()
+# import distutils before calling pd.show_versions(). not needed for pd >= 1.4.x
 # https://github.com/pypa/setuptools/issues/3044
-import distutils  # noqa: F401
+#import distutils  # noqa: F401
 
 import pandas as pd
 pd.show_versions()
diff --git a/requirements.txt b/requirements.txt
index fa3d21bb..77b53b66 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,8 +7,9 @@ ipython==8.13.0
 kiwisolver==1.4.4
 matplotlib==3.5.1
 more-itertools==9.1.0
+numba==0.58.1
 numpy==1.24.2
-pandas==1.3.5
+pandas==1.4.4
 pluggy==1.0.0
 pvlib==0.9.4
 pvmismatch==4.1