diff --git a/Dockerfile b/Dockerfile
index 9c44a81..174e6ff 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ WORKDIR /src
 COPY . .
 RUN make kube-notary
 
-FROM alpine:3.9
+FROM alpine:3.9.4
 
 RUN apk update && apk add ca-certificates curl && rm -rf /var/cache/apk/*
 RUN mkdir /lib64 && ln -s /lib/libc.musl-x86_64.so.1 /lib64/ld-linux-x86-64.so.2