diff --git a/Dockerfile b/Dockerfile
index 092b9c3a..67e1cf69 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,11 +38,12 @@ ENV USER= \
     SHADOWSOCKS=off \
     SHADOWSOCKS_LOG=on \
     SHADOWSOCKS_PORT=8388 \
-    SHADOWSOCKS_PASSWORD=
+    SHADOWSOCKS_PASSWORD= \
+    TZ=
 ENTRYPOINT /entrypoint.sh
 EXPOSE 8888/tcp 8388/tcp 8388/udp
 HEALTHCHECK --interval=3m --timeout=3s --start-period=20s --retries=1 CMD /healthcheck.sh
-RUN apk add -q --progress --no-cache --update openvpn wget ca-certificates iptables unbound unzip tinyproxy jq && \
+RUN apk add -q --progress --no-cache --update openvpn wget ca-certificates iptables unbound unzip tinyproxy jq tzdata && \
     echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories && \
     apk add -q --progress --no-cache --update shadowsocks-libev && \
     wget -q https://www.privateinternetaccess.com/openvpn/openvpn.zip \
diff --git a/README.md b/README.md
index 488830eb..0a5a5eba 100644
--- a/README.md
+++ b/README.md
@@ -170,6 +170,7 @@ docker run --rm --network=container:pia alpine:3.10 wget -qO- https://ipinfo.io
 | `SHADOWSOCKS_LOG` | `on` | `on` or `off` to enable logging for Shadowsocks  |
 | `SHADOWSOCKS_PORT` | `8388` | `1024` to `65535` internal port for SOCKS5 proxy |
 | `SHADOWSOCKS_PASSWORD` | | Passsword to use to connect to the SOCKS5 proxy |
+| `TZ` | | Specify a timezone to use e.g. `Europe/London` |
 
 ## Connect to it