diff --git a/RUBYGEM.md b/RUBYGEM.md
index ba16387c..eff6e27c 100644
--- a/RUBYGEM.md
+++ b/RUBYGEM.md
@@ -5,5 +5,5 @@ Then run the following [Docker](https://docs.docker.com/engine/installation/) co
 
 ```bash
 docker build -t auth0-publish-rubygem .
-docker run --rm -e RUBYGEMS_EMAIL=$RUBYGEMS_EMAIL -e RUBYGEMS_PASSWORD=$RUBYGEMS_PASSWORD -it auth0-publish-rubygem /bin/sh publish_rubygem.sh
+docker run --rm -e RUBYGEMS_EMAIL="$RUBYGEMS_EMAIL" -e RUBYGEMS_PASSWORD="$RUBYGEMS_PASSWORD" -it auth0-publish-rubygem /bin/sh publish_rubygem.sh
 ```
diff --git a/publish_rubygem.sh b/publish_rubygem.sh
index fd245a2b..31f28fee 100644
--- a/publish_rubygem.sh
+++ b/publish_rubygem.sh
@@ -1,12 +1,10 @@
 #!/usr/bin/env bash
 
-# Create file with credentials for rubygems.org
-touch credentials.txt
-echo $RUBYGEMS_EMAIL > credentials.txt
-echo $RUBYGEMS_PASSWORD >> credentials.txt
-# build the gem
+# Create directory for rubygems credentials
+mkdir /root/.gem
+# Get API key from rubygems.org
+curl -u "$RUBYGEMS_EMAIL":"$RUBYGEMS_PASSWORD" https://rubygems.org/api/v1/api_key.yaml > ~/.gem/credentials; chmod 0600 ~/.gem/credentials
+# Build Gem
 gem build auth0.gemspec
-# publish the gem on rubygems.org
-gem push auth0-*.gem < credentials.txt
-# Delete credentials file
-rm credentials.txt
+# Publish Gem
+gem push auth0-*.gem