diff --git a/Dockerfile b/Dockerfile
index 60e8a81..313c737 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,8 @@ COPY ./build.sh /usr/local/bin/build
 RUN chmod 755 /usr/local/bin/build
 RUN echo "${ALPINE_VERSION}" | cut -d . -f 1,2 | xargs -I {} echo 'https://alpine.sutty.nl/alpine/v{}/sutty' >> /etc/apk/repositories
 RUN wget https://alpine.sutty.nl/alpine/sutty.pub -O /etc/apk/keys/alpine@sutty.nl-5ea884cd.rsa.pub
+# We need to update to the builder has access to installing packages
+RUN apk update
 
 USER builder
 ENTRYPOINT /usr/local/bin/build