diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 6837776..a582342 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -16,6 +16,6 @@ jobs:
         with:
           node-version: "18"
       - name: Install dependencies
-        run: yarn --frozen-lockfile
+        run: yarn --immutable
       - name: Run tests
         run: yarn test
diff --git a/.github/workflows/edge_ghpage.yml b/.github/workflows/edge_ghpage.yml
index a105b4b..ea8cfdb 100644
--- a/.github/workflows/edge_ghpage.yml
+++ b/.github/workflows/edge_ghpage.yml
@@ -16,7 +16,7 @@ jobs:
           node-version: "18"
       - name: Install and Build 🔧
         run: |
-          yarn install
+          yarn install --immutable
           yarn build
 
       - name: Deploy 🚀
diff --git a/.github/workflows/github-release.yml b/.github/workflows/github-release.yml
index 930c400..7ad2d4f 100644
--- a/.github/workflows/github-release.yml
+++ b/.github/workflows/github-release.yml
@@ -17,7 +17,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: "18"
-      - run: yarn install
+      - run: yarn install --immutable
       - run: yarn build
       - run: |
           version=`git describe --dirty --tags || echo unknown`
diff --git a/Dockerfile b/Dockerfile
index 93de6c7..12b6ed1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ ARG REACT_APP_SERVER
 WORKDIR /src
 
 COPY . /src
-RUN yarn --network-timeout=300000 install
+RUN yarn --network-timeout=300000 install --immutable
 RUN REACT_APP_SERVER=$REACT_APP_SERVER yarn build