diff --git a/Dockerfile b/Dockerfile
index 62220e0..dc414df 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.13 AS builder
+FROM golang:1.16 AS builder
 
 RUN apt-get update && apt-get install -y python3
 WORKDIR /workdir
@@ -6,7 +6,7 @@ WORKDIR /workdir
 COPY . .
 RUN make build
 
-FROM alpine:3.11
+FROM alpine:3.13
 
 ENV CONFIG=/config/server.conf
 RUN adduser -D spreedbackend && \
diff --git a/docker-compose.yml b/docker-compose.yml
index e4b0150..37c66d0 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -12,7 +12,7 @@ services:
       - janus
       - coturn
   nats:
-    image: nats:2.1
+    image: nats:2.2.1
     volumes:
       - ./gnatsd.conf:/config/gnatsd.conf
     command: ["-c", "/config/gnatsd.conf"]
diff --git a/docker/coturn/Dockerfile b/docker/coturn/Dockerfile
index e178bce..3dbd306 100644
--- a/docker/coturn/Dockerfile
+++ b/docker/coturn/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.11
+FROM alpine:3.13
 
 RUN apk add --no-cache coturn
 
diff --git a/docker/janus/Dockerfile b/docker/janus/Dockerfile
index fb964b0..65dcd53 100644
--- a/docker/janus/Dockerfile
+++ b/docker/janus/Dockerfile
@@ -1,12 +1,13 @@
 # Modified from https://gitlab.com/powerpaul17/nc_talk_backend/-/blob/dcbb918d8716dad1eb72a889d1e6aa1e3a543641/docker/janus/Dockerfile
-FROM alpine:3.11
+FROM alpine:3.13
 
 RUN apk add --no-cache curl autoconf automake libtool pkgconf build-base \
   glib-dev libconfig-dev libnice-dev jansson-dev openssl-dev zlib libsrtp-dev \
-  gengetopt libwebsockets-dev git
+  gengetopt libwebsockets-dev git curl-dev libogg-dev
 
 # usrsctp
-ARG USRSCTP_VERSION=4069ba5b9587bd7c99d964756b527d6259f0d3da
+# 29 Mar 2021
+ARG USRSCTP_VERSION=70d42ae95a1de83bd317c8cc9503f894671d1392
 
 RUN cd /tmp && \
     git clone https://github.com/sctplab/usrsctp && \
@@ -16,9 +17,20 @@ RUN cd /tmp && \
     ./configure --prefix=/usr && \
     make && make install
 
+# libsrtp
+RUN cd /tmp && \
+    wget https://github.com/cisco/libsrtp/archive/v2.3.0.tar.gz && \
+    tar xfv v2.3.0.tar.gz && \
+    cd libsrtp-2.3.0 && \
+    ./configure --prefix=/usr --enable-openssl && \
+    make shared_library && \
+    make install && \
+    rm -fr /libsrtp-2.3.0 && \
+    rm -f /v2.3.0.tar.gz
+
 # JANUS
 
-ARG JANUS_VERSION=0.9.2
+ARG JANUS_VERSION=0.11.1
 RUN mkdir -p /usr/src/janus && \
     cd /usr/src/janus && \
     curl -L https://github.com/meetecho/janus-gateway/archive/v$JANUS_VERSION.tar.gz | tar -xz && \