diff --git a/.github/workflows/build_web.yml b/.github/workflows/build_web.yml
index f3d5ba8d..74e86854 100644
--- a/.github/workflows/build_web.yml
+++ b/.github/workflows/build_web.yml
@@ -29,6 +29,9 @@ jobs:
     - name: Build Flutter web app
       run: flutter build web --release --wasm
 
+    - name: Update base href in index.html
+      run: sed -i 's|<base href="/">|<base href="/web/">|g' build/web/index.html
+
     - name: Upload to SFTP
       uses: wlixcc/SFTP-Deploy-Action@v1.2.4
       with: