diff --git a/docs/requirements.txt b/docs/requirements.txt
index 7456c6a36..434d5477e 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -9,6 +9,8 @@ sphinx-copybutton>=0.5.0
 jupyter-sphinx>=0.3.2
 # Newer versions cause build failures; see https://github.com/google/jax/pull/10502
 myst-nb==0.15.0
+# Traitlets 5.2.X fails: https://github.com/ipython/traitlets/issues/741
+traitlets<5.2.0
 
 # Need to pin docutils to 0.16 to make bulleted lists appear correctly on
 # ReadTheDocs: https://stackoverflow.com/a/68008428