diff --git a/doc/requirements.txt b/doc/requirements.txt
index 6ab8acfc4..1dd52eaaf 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -8,7 +8,7 @@ sphinx_book_theme
 sphinxcontrib-bibtex
 myst-parser  # recommark is deprecated, https://stackoverflow.com/a/71660856/13573820
 
-pypsa
+pypsa >=0.24, <0.25
 vresutils>=0.3.1
 powerplantmatching>=0.5.5
 atlite>=0.2.9
@@ -36,6 +36,6 @@ ruamel.yaml<=0.17.26
 earth-osm>=2.3.post1
 reverse-geocode
 pyDOE2
-# graphviz
+graphviz
 
 fake_useragent