diff --git a/Dockerfile b/Dockerfile
index 1dc36ef..4e6f23a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,10 @@
 ############################################################
-# Dockerfile - Janus Gateway on Debian Jessie
+# Dockerfile - Janus Gateway on Debian Stretch
 # https://github.com/krull/docker-janus
 ############################################################
 
 # set base image debian jessie
-FROM debian:jessie
+FROM debian:stretch
 
 # file maintainer author
 MAINTAINER brendan jocson <brendan@jocson.eu>
@@ -23,7 +23,7 @@ ARG JANUS_WITH_WEBSOCKETS="1"
 ARG JANUS_WITH_MQTT="0"
 ARG JANUS_WITH_PFUNIX="1"
 ARG JANUS_WITH_RABBITMQ="0"
-# https://goo.gl/dmbvc1 
+# https://goo.gl/dmbvc1
 ARG JANUS_WITH_FREESWITCH_PATCH="0"
 ARG JANUS_CONFIG_DEPS="\
     --prefix=/opt/janus \
@@ -39,6 +39,7 @@ ARG JANUS_BUILD_DEPS_DEV="\
     libglib2.0-dev \
     libopus-dev \
     libogg-dev \
+    liblua5.3-dev \
     pkg-config \
     "
 ARG JANUS_BUILD_DEPS_EXT="\
@@ -82,9 +83,9 @@ RUN \
     && DEBIAN_FRONTEND=noninteractive apt-get update \
     && DEBIAN_FRONTEND=noninteractive apt-get -y --no-install-recommends install $JANUS_BUILD_DEPS_DEV ${JANUS_BUILD_DEPS_EXT} \
 # build libsrtp
-    && curl -fSL https://github.com/cisco/libsrtp/archive/v2.0.0.tar.gz -o ${BUILD_SRC}/v2.0.0.tar.gz \
-    && tar xzf ${BUILD_SRC}/v2.0.0.tar.gz -C ${BUILD_SRC} \
-    && cd ${BUILD_SRC}/libsrtp-2.0.0 \
+    && curl -fSL https://github.com/cisco/libsrtp/archive/v2.1.0.tar.gz -o ${BUILD_SRC}/v2.1.0.tar.gz \
+    && tar xzf ${BUILD_SRC}/v2.1.0.tar.gz -C ${BUILD_SRC} \
+    && cd ${BUILD_SRC}/libsrtp-2.1.0 \
     && ./configure --prefix=/usr --enable-openssl \
     && make shared_library \
     && make install \
diff --git a/README.md b/README.md
index ef9fd64..22261a5 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # docker-janus
-`docker-janus` is a Debian 8 based docker image for [Meetecho's Janus Gateway](https://github.com/meetecho/janus-gateway)
+`docker-janus` is a Debian 9 based docker image for [Meetecho's Janus Gateway](https://github.com/meetecho/janus-gateway)
 
 ## Description
 All the janus docker builds I have seen in hub.docker.com were all ubuntu based and/or of some redhat flavor. I successfully build janus in debian 7 and 8 before, so I thought it would be a good way to practice docker best practices and provide a debian based image at the same time.
@@ -17,7 +17,7 @@ Many thanks for [meetecho](http://www.meetecho.com) for providing us [Janus Gate
 
 I have tried to build the image with docker best practices at hand. Should there be anything of note you notices, please do not hesitate to leave a comment!
 
-## quickstart 
+## quickstart
 ```
 root@mcroth:~/sandbox# git clone https://github.com/krull/docker-janus.git
 Cloning into 'docker-janus'...
@@ -40,16 +40,16 @@ Creating janus-gateway
 root@mcroth:~/sandbox/docker-janus# docker-compose ps
     Name              Command          State                       Ports                      
 ---------------------------------------------------------------------------------------------
-janus-gateway   /opt/janus/bin/janus   Up      0.0.0.0:8088->8088/tcp, 0.0.0.0:8188->8188/tcp 
+janus-gateway   /opt/janus/bin/janus   Up      0.0.0.0:8088->8088/tcp, 0.0.0.0:8188->8188/tcp
 root@mcroth:~/sandbox/docker-janus# docker images
 REPOSITORY            TAG                 IMAGE ID            CREATED             SIZE
 mcroth/docker-janus   latest              1dd697edcb76        23 minutes ago      232.9 MB
-root@mcroth:~/sandbox/docker-janus# 
+root@mcroth:~/sandbox/docker-janus#
 ```
 
 Visiting `http://localhost:8088/janus/info` in your browser should provide you with the build info of janus in JSON format.
 
-A full set of default janus config files are in `./janus` folder, which is referenced as a volume in the `docker-compose.yml` file for docker-compose to use. 
+A full set of default janus config files are in `./janus` folder, which is referenced as a volume in the `docker-compose.yml` file for docker-compose to use.
 
 ## build criteria
 `janus-gateway` is built with the following configured options disabled, as I do not have the need for them to be enabled by default: