diff --git a/Dockerfile b/Dockerfile
index 1757214..486ed3a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,7 +27,7 @@ RUN apt-get update && apt-get upgrade -y \
     # clean up after ourselves
     && apt-get clean
 
-ENV PHOENIX_VERSION 1.2.0
+ENV PHOENIX_VERSION 1.2.1
 
 # install the Phoenix Mix archive
 RUN mix archive.install --force https://github.com/phoenixframework/archives/raw/master/phoenix_new-$PHOENIX_VERSION.ez