diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 3b55a98..787eed8 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -54,9 +54,11 @@ jobs:
           python-version: "3.11"
 
       - name: Install dependencies
+        working-directory: backend
         run: pip install -r requirements.txt
 
       - name: Run unit test
+        working-directory: backend
         run: pytest
 
   build-and-push-image:
diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index 73ffc7f..43e75c2 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -1,5 +1,5 @@
 # build environment
-FROM nikolaik/python-nodejs:python3.10-nodejs18-alpine as react-build
+FROM nikolaik/python-nodejs:python3.10-nodejs18-bullseye as react-build
 WORKDIR /app
 COPY . ./
 RUN yarn install