diff --git a/docker/Dockerfile.flux b/docker/Dockerfile.flux
index 4fe5d388d3..30926ae232 100644
--- a/docker/Dockerfile.flux
+++ b/docker/Dockerfile.flux
@@ -1,4 +1,4 @@
-FROM alpine:3.6
+FROM alpine:3.9
 
 WORKDIR /home/flux
 
diff --git a/docker/Dockerfile.helm-operator b/docker/Dockerfile.helm-operator
index 812c2fb824..04cfcd7396 100644
--- a/docker/Dockerfile.helm-operator
+++ b/docker/Dockerfile.helm-operator
@@ -1,4 +1,4 @@
-FROM alpine:3.6
+FROM alpine:3.9
 
 WORKDIR /home/flux