diff --git a/Dockerfile b/Dockerfile
index d21eb0a..60e8a81 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,9 +5,8 @@ MAINTAINER "f <f@sutty.nl>"
 
 COPY ./build.sh /usr/local/bin/build
 RUN chmod 755 /usr/local/bin/build
-RUN echo 'https://alpine.sutty.nl/alpine/v3.12/sutty' >> /etc/apk/repositories
+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
-RUN apk update || true
 
 USER builder
 ENTRYPOINT /usr/local/bin/build