diff --git a/1.11/Dockerfile b/1.11/Dockerfile
index 880af8cae..ab6e24e15 100644
--- a/1.11/Dockerfile
+++ b/1.11/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.4
+FROM alpine:3.5
 
 RUN apk add --no-cache \
 		ca-certificates \
diff --git a/1.12/Dockerfile b/1.12/Dockerfile
index 477a18f27..4ca6ea243 100644
--- a/1.12/Dockerfile
+++ b/1.12/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.4
+FROM alpine:3.5
 
 RUN apk add --no-cache \
 		ca-certificates \
diff --git a/1.12/experimental/Dockerfile b/1.12/experimental/Dockerfile
index 4796c9d3e..8331d6c76 100644
--- a/1.12/experimental/Dockerfile
+++ b/1.12/experimental/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.4
+FROM alpine:3.5
 
 RUN apk add --no-cache \
 		ca-certificates \
diff --git a/1.13-rc/Dockerfile b/1.13-rc/Dockerfile
index 3fb0e39cc..2a18a9915 100644
--- a/1.13-rc/Dockerfile
+++ b/1.13-rc/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.4
+FROM alpine:3.5
 
 RUN apk add --no-cache \
 		ca-certificates \