diff --git a/Dockerfile b/Dockerfile
index 2c4bbefe5..b1ff73181 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -26,7 +26,7 @@ COPY ./src-ui /src/src-ui
 WORKDIR /src/src-ui
 RUN set -eux \
   && npm update npm -g \
-  && npm ci --no-optional
+  && npm ci --omit=optional
 RUN set -eux \
   && ./node_modules/.bin/ng build --configuration production
 
diff --git a/docker-builders/Dockerfile.frontend b/docker-builders/Dockerfile.frontend
index 26f6c9e15..e552ee184 100644
--- a/docker-builders/Dockerfile.frontend
+++ b/docker-builders/Dockerfile.frontend
@@ -9,6 +9,6 @@ COPY ./src-ui /src/src-ui
 WORKDIR /src/src-ui
 RUN set -eux \
   && npm update npm -g \
-  && npm ci --no-optional
+  && npm ci --omit=optional
 RUN set -eux \
   && ./node_modules/.bin/ng build --configuration production