diff --git a/docs/changes/964.doc.rst b/docs/changes/964.doc.rst
new file mode 100644
index 000000000..baea2e709
--- /dev/null
+++ b/docs/changes/964.doc.rst
@@ -0,0 +1,3 @@
+Fixed notebook compatibility issues: added ``seaborn`` to docs build dependencies
+and fixed ``set_xdata`` scalar-vs-array bug in the interactive phaseogram widget
+in the Pulsar notebook.
diff --git a/pyproject.toml b/pyproject.toml
index ec8aa8e0c..20da7441a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -90,6 +90,7 @@ docs = [
     "pandoc",
     "ipython",
     "towncrier<22.12.0",
+    "seaborn",
 ]
 
 [project.urls]