diff --git a/core/python2ActionLoop/Dockerfile b/core/python2ActionLoop/Dockerfile
index 1624c5d..043315c 100644
--- a/core/python2ActionLoop/Dockerfile
+++ b/core/python2ActionLoop/Dockerfile
@@ -26,7 +26,7 @@
 
 # or build it from a release
 FROM golang:1.15 AS builder_release
-ARG GO_PROXY_RELEASE_VERSION=1.12@1.15.0
+ARG GO_PROXY_RELEASE_VERSION=1.15@1.16.0
 RUN curl -sL \
   https://github.com/apache/openwhisk-runtime-go/archive/{$GO_PROXY_RELEASE_VERSION}.tar.gz\
   | tar xzf -\
@@ -35,7 +35,7 @@
 
 FROM python:2.7-alpine
 # select the builder to use
-ARG GO_PROXY_BUILD_FROM=source
+ARG GO_PROXY_BUILD_FROM=release
 
 # Upgrade and install basic Python dependencies
 RUN apk add --no-cache \
diff --git a/core/python3ActionLoop/Dockerfile b/core/python3ActionLoop/Dockerfile
index 0ce04cd..5edc5d3 100644
--- a/core/python3ActionLoop/Dockerfile
+++ b/core/python3ActionLoop/Dockerfile
@@ -25,7 +25,7 @@
 
 # or build it from a release
 FROM golang:1.15 AS builder_release
-ARG GO_PROXY_RELEASE_VERSION=1.12@1.15.0
+ARG GO_PROXY_RELEASE_VERSION=1.15@1.16.0
 RUN curl -sL \
   https://github.com/apache/openwhisk-runtime-go/archive/{$GO_PROXY_RELEASE_VERSION}.tar.gz\
   | tar xzf -\
@@ -33,7 +33,7 @@
   && GO111MODULE=on go build -o /bin/proxy
 
 FROM python:3.7-buster
-ARG GO_PROXY_BUILD_FROM=source
+ARG GO_PROXY_BUILD_FROM=release
 
 # Install common modules for python
 RUN pip install \
diff --git a/core/python3AiActionLoop/Dockerfile b/core/python3AiActionLoop/Dockerfile
index 54c6038..114c145 100644
--- a/core/python3AiActionLoop/Dockerfile
+++ b/core/python3AiActionLoop/Dockerfile
@@ -26,7 +26,7 @@
 
 # or build it from a release
 FROM golang:1.15 AS builder_release
-ARG GO_PROXY_RELEASE_VERSION=1.12@1.15.0
+ARG GO_PROXY_RELEASE_VERSION=1.15@1.16.0
 RUN curl -sL \
   https://github.com/apache/openwhisk-runtime-go/archive/${GO_PROXY_RELEASE_VERSION}.tar.gz\
   | tar xzf -\
@@ -37,7 +37,7 @@
 FROM tensorflow/tensorflow:1.15.2-py3-jupyter
 
 # select the builder to use
-ARG GO_PROXY_BUILD_FROM=source
+ARG GO_PROXY_BUILD_FROM=release
 
 RUN apt-get update && apt-get upgrade -y && apt-get install -y \
             curl \