diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index 45d4f22..6491e38 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -11,7 +11,7 @@ jobs:
       - name: checkout
         uses: actions/checkout@v3
       - name: install pelican
-        run: pipx install --verbose 'pelican[markdown]==4.7.2'
+        run: pipx install --verbose $(head -1 requirements.txt)
       - name: generate
         run: make html
       - name: publish
diff --git a/requirements.txt b/requirements.txt
index 726fbec..9094414 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-pelican[markdown]==4.7.2
+pelican[markdown]==4.9.1