diff --git a/doc/rtd_requirements.txt b/doc/rtd_requirements.txt
index 1e58136155..2c1e4784a6 100644
--- a/doc/rtd_requirements.txt
+++ b/doc/rtd_requirements.txt
@@ -4,9 +4,9 @@ mock>=5.0.2
 setuptools>=67.7.2
 # pysb>=1.11.0
 # WIP PR for compatibility with recent sympy
-#  https://github.com/pysb/pysb/pull/599
+#  https://github.com/pysb/pysb/pull/599 / https://github.com/jmuhlich/pysb/pull/6
 #  for building the documentation, we don't care whether this fully works
-git+https://github.com/pysb/pysb@0afeaab385e9a1d813ecf6fdaf0153f4b91358af
+git+https://github.com/jmuhlich/pysb@22d69a350b472f33d85ba64ffb10b190483c1c98
 # For forward type definition in generate_equinox
 matplotlib>=3.7.1
 optax
diff --git a/python/sdist/pyproject.toml b/python/sdist/pyproject.toml
index be2f4c97a1..425ce7d533 100644
--- a/python/sdist/pyproject.toml
+++ b/python/sdist/pyproject.toml
@@ -60,7 +60,7 @@ classifiers = [
 #  HTTPError: 400 Bad Request from https://upload.pypi.org/legacy/
 #  Invalid value for requires_dist. Error: Can't have direct dependency: ...
 petab = ["petab>=0.7.0"]
-pysb = ["pysb>=1.13.1"]
+pysb = ["pysb>=1.17.0"]
 test = [
     "fiddy>=0.0.3",
     "h5py!=3.15",