diff --git a/Dockerfile b/Dockerfile
index c847ec1..5a5917a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,8 @@ FROM alpine:3.8
 
 LABEL maintainer="Matthias Lohr <matthias@lohr.me>"
 
-RUN apk add --no-cache bash ca-certificates file iptables libc6-compat libgcc libstdc++ wget
+RUN apk add --no-cache bash ca-certificates file iptables libc6-compat libgcc libstdc++ wget && \
+	update-ca-certificates
 
 RUN mkdir -p /tmp/f5fpc && \
     cd /tmp/f5fpc && \