diff --git a/Dockerfile b/Dockerfile
index c1cbab9..1474d40 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.5
+FROM alpine:3.6
 MAINTAINER Cameron Eagans <me@cweagans.net>
 
 # Install needed packages.
@@ -11,11 +11,10 @@ MAINTAINER Cameron Eagans <me@cweagans.net>
 RUN apk add --no-cache bash
 
 # Install Unison from source with inotify support + remove compilation tools
-ARG UNISON_VERSION=2.48.4
+ARG UNISON_VERSION=2.51.2
 RUN apk add --no-cache --virtual .build-dependencies build-base curl && \
-    apk add --no-cache inotify-tools && \
-    apk add --no-cache --repository http://dl-4.alpinelinux.org/alpine/edge/testing/ ocaml && \
-    curl -L https://github.com/bcpierce00/unison/archive/$UNISON_VERSION.tar.gz | tar zxv -C /tmp && \
+    apk add --no-cache inotify-tools ocaml && \
+    curl -L https://github.com/bcpierce00/unison/archive/v$UNISON_VERSION.tar.gz | tar zxv -C /tmp && \
     cd /tmp/unison-${UNISON_VERSION} && \
     sed -i -e 's/GLIBC_SUPPORT_INOTIFY 0/GLIBC_SUPPORT_INOTIFY 1/' src/fsmonitor/linux/inotify_stubs.c && \
     make UISTYLE=text NATIVE=true STATIC=true && \