diff --git a/docs/conf.py b/docs/conf.py
index 4b21aa7..f046ca1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -72,8 +72,18 @@
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
-# Exclude .ipynb files since we use jupytext-paired .md files as the source
-exclude_patterns = ["_build", "**/*.ipynb"]
+# Exclude .ipynb files that have a paired jupytext .md file
+# (the .md is the source of truth for those). Notebooks without
+# a paired .md (e.g. cfinterval.ipynb) are kept as-is.
+from pathlib import Path
+
+_ipynb_excludes = [
+    str(p.relative_to(Path(__file__).parent))
+    for p in Path(__file__).parent.rglob("*.ipynb")
+    if p.with_suffix(".md").exists()
+    and "_build" not in p.parts
+]
+exclude_patterns = ["_build"] + _ipynb_excludes
 
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = "igor"
diff --git a/pyproject.toml b/pyproject.toml
index 1e93684..ab33fc7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,6 +6,7 @@ readme = "README.md"
 requires-python = ">=3.11"
 license = "Apache-2.0"
 dependencies = [
+    "pandas<3",
     "pooch",
     "netCDF4",
     "matplotlib",
diff --git a/requirements.txt b/requirements.txt
index 3dd8211..b1a3071 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+pandas<3
 pooch
 netCDF4
 matplotlib