diff --git a/app.dockerfile b/app.dockerfile
index 8337171..ff1824d 100644
--- a/app.dockerfile
+++ b/app.dockerfile
@@ -9,7 +9,7 @@ WORKDIR /home/perplexica
 
 COPY ui /home/perplexica/
 
-RUN yarn install
+RUN yarn install --frozen-lockfile
 RUN yarn build
 
 CMD ["yarn", "start"]
\ No newline at end of file
diff --git a/backend.dockerfile b/backend.dockerfile
index 66de9dc..8367bb0 100644
--- a/backend.dockerfile
+++ b/backend.dockerfile
@@ -13,7 +13,7 @@ COPY yarn.lock /home/perplexica/
 
 RUN mkdir /home/perplexica/data
 
-RUN yarn install 
+RUN yarn install --frozen-lockfile
 RUN yarn build
 
 CMD ["yarn", "start"]
\ No newline at end of file