diff --git a/.forgejo/workflows/test-build.yaml b/.forgejo/workflows/test-build.yaml
index cfa8d2c67..e45aa8f1c 100644
--- a/.forgejo/workflows/test-build.yaml
+++ b/.forgejo/workflows/test-build.yaml
@@ -20,7 +20,7 @@ jobs:
         run: |
           cd /iceshrimp
           cp -Tr /iceshrimp-caches/yarn .yarn
-          yarn
+          yarn --immutable --immutable-cache
           rm -rf /iceshrimp-caches/yarn/* && cp -Tr .yarn /iceshrimp-caches/yarn
       - name: Build the shrimp
         run: |
diff --git a/Dockerfile b/Dockerfile
index cf78a647d..69fc49efb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@ COPY . ./
 RUN --mount=type=cache,target=/iceshrimp/.yarncache cp -Tr .yarncache .yarn
 
 # Configure corepack and install dev mode dependencies for compilation
-RUN corepack enable && corepack prepare --activate && yarn
+RUN corepack enable && corepack prepare --activate && yarn --immutable --immutable-cache
 
 # Save yarn cache
 RUN --mount=type=cache,target=/iceshrimp/.yarncache rm -rf .yarncache/* && cp -Tr .yarn .yarncache