diff --git a/pyproject.toml b/pyproject.toml
index d19728c..fb3e403 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ dependencies = [
     "numpy",
     "scipy",
     "h5py",
-    "bokeh ~=3.9",
+    "bokeh ~=3.8.0",  # https://github.com/bokeh/bokeh/issues/13859
     "numba",
     "lmfit >=1.0.2",
 ]