diff --git a/.codespellrc b/.codespellrc
index 0eb7804..9c98d12 100644
--- a/.codespellrc
+++ b/.codespellrc
@@ -1,5 +1,5 @@
 [codespell]
-skip = .git,*.ipynb,*.bib,*.ps
+skip = .git,*.bib,*.ps
 ignore-words = .codespell-ignore-words
 
 
diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
index 737acff..a500eeb 100644
--- a/.github/workflows/codespell.yml
+++ b/.github/workflows/codespell.yml
@@ -26,6 +26,9 @@ jobs:
       - name: Install dependencies
         run: pip install -r ./requirements.txt
 
+      - name: Preprocess notebooks
+        run: for i in $(find . -name "*.ipynb"); do jupyter nbconvert --clear-output --inplace $i; done
+
       - name: Run codespell
         run: |
           codespell
diff --git a/docs/hse-reconstruction.ipynb b/docs/hse-reconstruction.ipynb
index de31ba2..946d0d7 100644
--- a/docs/hse-reconstruction.ipynb
+++ b/docs/hse-reconstruction.ipynb
@@ -473,7 +473,7 @@
    "id": "ec8ae681-d63c-4426-8939-898f8e6154fc",
    "metadata": {},
    "source": [
-    "The final variation is to keep the parabola in terms of $p^\\prime$ and do the characterstic tracing\n",
+    "The final variation is to keep the parabola in terms of $p^\\prime$ and do the characteristic tracing\n",
     "on that.  Then we need add back in the HSE interface pressure after the tracing.  \n",
     "\n",
     "A few notes:\n",