diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index f7511ae..8e2de95 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,4 +1,4 @@
-FROM nicbet/phoenix:1.6.2
+FROM nicbet/phoenix:1.6.3
 
 RUN apt-get install -y ruby \
   && gem install --no-ri --no-rdoc htmlbeautifier -v 1.3.1 \
diff --git a/Dockerfile b/Dockerfile
index 312419e..f17887d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-FROM elixir:1.12.3
+FROM elixir:1.13.0
 
 # Build Args
-ARG PHOENIX_VERSION=1.6.2
+ARG PHOENIX_VERSION=1.6.3
 ARG NODEJS_VERSION=16.x
 
 # Apt
diff --git a/Makefile b/Makefile
index 3f0eebb..88b6a55 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 OWNER = nicbet
 IMAGE = phoenix
 TAG = $(OWNER)/$(IMAGE)
-VERSION = 1.6.2
+VERSION = 1.6.3
 
 all: test
 
diff --git a/README.md b/README.md
index d8ea32b..6e2d8db 100644
--- a/README.md
+++ b/README.md
@@ -25,10 +25,10 @@ It's so simple: just clone this repository.
 
 You can specify a particular Phoenix version by targeting the corresponding release tag of this repository.
 
-For instance, for a dockerized development environment for Phoenix 1.6.2 you could run:
+For instance, for a dockerized development environment for Phoenix 1.6.3 you could run:
 
 ```
-git clone -b v1.6.2 https://github.com/nicbet/docker-phoenix ~/Projects/hello-phoenix
+git clone -b v1.6.3 https://github.com/nicbet/docker-phoenix ~/Projects/hello-phoenix
 ```
 
 ### New with Elixir 1.9: Releases
diff --git a/docker-compose.yml b/docker-compose.yml
index 6c8bee6..79e9da5 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,7 +2,7 @@
 version: "2"
 services:
   app:
-    image: nicbet/phoenix:1.6.2
+    image: nicbet/phoenix:1.6.3
     build: .
     ports:
       - "4000:4000"