diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a52d60e..90a484d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -16,7 +16,7 @@ build-src:
     - curl -sL https://deb.nodesource.com/setup_10.x | bash -
     - apt update
     - apt install -y nodejs
-    - npm install -g html-minifier uglify-js sass
+    - npm install -g html-minifier@3.5.7 uglify-js@3.4.1 sass@1.5.1
     - mkdir -p src/gitlab.com/commento && cd src/gitlab.com/commento && ln -s $CI_PROJECT_DIR && cd $CI_PROJECT_NAME
     - make devel
     - make prod
diff --git a/Dockerfile b/Dockerfile
index 8864575..5c08751 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,7 +16,7 @@ COPY ./frontend /commento-ce/frontend/
 WORKDIR /commento-ce/frontend/
 
 RUN apk update && apk add bash make
-RUN npm install -g html-minifier uglify-js sass
+RUN npm install -g html-minifier@3.5.7 uglify-js@3.4.1 sass@1.5.1
 
 RUN make prod