diff --git a/Makefile b/Makefile
index b5f89755..0338aa54 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ BIN := workerpodautoscaler
 UNIQUE:=$(shell date +%s)
 
 # Where to push the docker image.
-REGISTRY := practodev
+REGISTRY ?= practodev
 
 BASE_BRANCH := master
 CURRENT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD)
diff --git a/README.md b/README.md
index 1c103aa1..6de05a69 100644
--- a/README.md
+++ b/README.md
@@ -220,15 +220,15 @@ git pull origin master
 
 ```
 
-- Build and push the image to `hub.docker.com/practodev`. Note: practodev push access is required.
+- Build and push the image to `hub.docker.com/practodev` or `public.ecr.aws/practo`. Note: dokcerhub or ECR push access is required or use a custom registry by adding `REGISTRY=public.ecr.aws/exampleorg make push`
 ```
 git fetch --tags
-git tag v1.3.0
+git tag v1.4.0
 make push
 ```
-Note: For every tag major and major minor versions tags also available. For example: `v1` and `v1.3`
+Note: For every tag major and major minor versions tags also available. For example: `v1` and `v1.4`
 
-- Create a Release in Github. Refer [this](https://github.com/practo/k8s-worker-pod-autoscaler/releases/tag/v1.3.0) and create a release. Release should contain the Changelog information of all the issues and pull request after the last release.
+- Create a Release in Github. Refer [this](https://github.com/practo/k8s-worker-pod-autoscaler/releases/tag/v1.4.0) and create a release. Release should contain the Changelog information of all the issues and pull request after the last release.
 
 -  Publish the release in Github 🎉
 
diff --git a/UPGRADE.md b/UPGRADE.md
index a2196901..6a962a6b 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -1,5 +1,17 @@
 # Upgrade Worker Pod Autoscaler
 
+## Upgrade from v1.3 to v1.4
+Updates all the kubernetes dependencies with `v1.20`. It should wwork for the cluster with older versions as well. Also with this release images are available in prato's public ECR as `public.ecr.aws/practo/workerpodautoscaler:v1.3.0`. Default is still practodev.
+
+### Breaking changes
+None
+
+### Recommended Actions
+None
+
+### Changes
+- [v1.4.0](https://github.com/practo/k8s-worker-pod-autoscaler/releases/tag/v1.4.0)
+
 ## Upgrade from v1.2 to v1.3
 
 ### Breaking changes