diff --git a/docs/requirements.txt b/docs/requirements.txt
index 5c7dae4..107da66 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -4,11 +4,10 @@ matplotlib
 astroquery
 pandas
 pillow
-sphinx_rtd_theme>=1
+sphinx_rtd_theme
 sphinx-prompt
 sphinx-copybutton
 bokeh
-
-sphinx>=4
+sphinx
 nbsphinx
 ipykernel
\ No newline at end of file
diff --git a/docs/source/conf.py b/docs/source/conf.py
index cc9389c..045fa79 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -142,9 +142,6 @@
      'Miscellaneous'),
 ]
 
-# Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {'https://docs.python.org/': None}
-
 html_show_sourcelink = True
 
 # inheritance diagram