diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 36fad43..f9f1a6c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,7 +54,7 @@ jobs:
       - name: Install Dependencies
         # Absurdly, yarn always fails on the first try here.
         # https://github.com/yarnpkg/yarn/issues/2629
-        run: until yarn install --no-lockfile; do echo "Retrying yarn"; done
+        run: until yarn install --immutable --immutable-cache --check-cache; do echo "Retrying yarn"; done
 
       - name: Run Tests
         run: yarn test:ember
@@ -86,11 +86,11 @@ jobs:
       - name: Install Node
         uses: actions/setup-node@v3
         with:
-          node-version: 14.x
+          node-version: 18.x
           cache: yarn
 
       - name: Install Dependencies
-        run: until yarn install --frozen-lockfile; do echo "Retrying yarn"; done
+        run: until yarn install --immutable --immutable-cache --check-cache; do echo "Retrying yarn"; done
 
       - name: Run Tests
         run: ./node_modules/.bin/ember try:one ${{ matrix.try-scenario }}