diff --git a/Dockerfile b/Dockerfile
index 2d1631b..9f8d942 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine
+FROM alpine:3.12.3
 WORKDIR /opt/
 
 ADD ./release/*/*/ubnt-freifunk-map-api /opt/ubnt-freifunk-map-api