diff --git a/Dockerfile b/Dockerfile
index 1341b8a..a68f75f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,13 @@
-FROM alpine:3.1
+FROM alpine:3.2
 
-RUN apk add -U alpine-sdk \
+RUN apk add -U alpine-sdk linux-headers \
     && curl ftp://ftp.isc.org/isc/bind9/9.10.2/bind-9.10.2.tar.gz|tar -xzv \
     && cd bind-9.10.2 \
     && CFLAGS="-static" ./configure --without-openssl --disable-symtable \
     && make \
     && cp ./bin/dig/dig /usr/bin/ \
-    && apk del alpine-sdk \
-    && rm -rf bind-9.10.2/
+    && apk del alpine-sdk linux-headers \
+    && rm -rf bind-9.10.2 \
+    && rm /var/cache/apk/*
 
 CMD bash