diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index 2b0ee1232..571e18e87 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -33,6 +33,11 @@ jobs:
           --file requirements.txt
           --file requirements-dev.txt
 
+    # For some reason Fiona doesn't get installed from requirements-dev...
+    - name: Install fiona dependency
+      shell: bash -l {0}
+      run: python -m pip install fiona
+
     - name: Install folium from source
       shell: bash -l {0}
       run: python -m pip install -e . --no-deps --force-reinstall
diff --git a/requirements-dev.txt b/requirements-dev.txt
index ae76a9351..ddbb465f3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,6 +2,7 @@ altair>=5.0.0
 cartopy
 check-manifest
 descartes
+fiona
 flake8
 flake8-builtins
 flake8-comprehensions