diff --git a/Dockerfile b/Dockerfile
index f034a3e2..20f7775b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM python:3.6-alpine
 
-RUN apk add --update --no-cache git g++ make libstdc++ gnupg musl-dev && \
+RUN apk add --no-cache git g++ make libstdc++ gnupg musl-dev && \
     mkdir /kapitan
 
 WORKDIR /kapitan
diff --git a/ci/Dockerfile b/ci/Dockerfile
index 8f09e78b..ce078458 100644
--- a/ci/Dockerfile
+++ b/ci/Dockerfile
@@ -1,6 +1,6 @@
 FROM google/cloud-sdk:alpine
 
-RUN apk add --update --no-cache python3-dev git g++ make libstdc++ gnupg musl-dev util-linux && \
+RUN apk add --no-cache python3-dev git g++ make libstdc++ gnupg musl-dev util-linux && \
     python3 -m ensurepip && \
     rm -r /usr/lib/python*/ensurepip && \
     pip3 install --upgrade --no-cache-dir pip setuptools && \