diff --git a/.github/workflows/build_windows.yml b/.github/workflows/build_windows.yml
index 2130133..1de2f69 100644
--- a/.github/workflows/build_windows.yml
+++ b/.github/workflows/build_windows.yml
@@ -38,7 +38,7 @@ jobs:
     - name: Install Python build dependencies
       run: |
         python -m pip install --upgrade pip 
-        pip install pyqt5==5.15.7 lxml pytest pytest-faulthandler language_tool_python symspellpy pyspellchecker pyenchant
+        pip install pyqt5==5.15.7 lxml pytest pytest-faulthandler markdown language_tool_python symspellpy pyspellchecker pyenchant
         pip install pyinstaller
     - name: pyinstaller build
       run: |