diff --git a/1.6/alpine/Dockerfile b/1.6/alpine/Dockerfile
index 125bb89d..a429874d 100644
--- a/1.6/alpine/Dockerfile
+++ b/1.6/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.5
+FROM alpine:3.4
 
 RUN apk add --no-cache ca-certificates
 
diff --git a/1.7/alpine/Dockerfile b/1.7/alpine/Dockerfile
index d7dd02a2..a7e1f50d 100644
--- a/1.7/alpine/Dockerfile
+++ b/1.7/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.5
+FROM alpine:3.4
 
 RUN apk add --no-cache ca-certificates