diff --git a/.github/workflows/verify.yml b/.github/workflows/verify.yml
index 931f617..d1b8176 100644
--- a/.github/workflows/verify.yml
+++ b/.github/workflows/verify.yml
@@ -58,7 +58,7 @@ jobs:
       - name: Install dependencies.
         run: |
           python -m pip install --upgrade pip
-          pip install -e .[dev]
+          pip install -e .[dev,docs]
           pip list
 
       # Tests.