diff --git a/1.6/alpine/Dockerfile b/1.6/alpine/Dockerfile
index a429874d..125bb89d 100644
--- a/1.6/alpine/Dockerfile
+++ b/1.6/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.4
+FROM alpine:3.5
 
 RUN apk add --no-cache ca-certificates
 
diff --git a/1.7/alpine/Dockerfile b/1.7/alpine/Dockerfile
index a7e1f50d..d7dd02a2 100644
--- a/1.7/alpine/Dockerfile
+++ b/1.7/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.4
+FROM alpine:3.5
 
 RUN apk add --no-cache ca-certificates
 
diff --git a/1.8/alpine/Dockerfile b/1.8/alpine/Dockerfile
index 017c99f9..91023b47 100644
--- a/1.8/alpine/Dockerfile
+++ b/1.8/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.4
+FROM alpine:3.5
 
 RUN apk add --no-cache ca-certificates