diff --git a/bitnami/ruby/2.5-prod/debian-9/Dockerfile b/bitnami/ruby/2.5-prod/debian-9/Dockerfile
index fa8a0a232b78..8540d482047e 100644
--- a/bitnami/ruby/2.5-prod/debian-9/Dockerfile
+++ b/bitnami/ruby/2.5-prod/debian-9/Dockerfile
@@ -1,4 +1,4 @@
-FROM bitnami/ruby:2.5.5-debian-9-r20 as development
+FROM bitnami/ruby:2.5.5-debian-9-r21 as development
 
 ######
 
@@ -14,7 +14,7 @@ RUN sed -i 's/^PASS_MAX_DAYS.*/PASS_MAX_DAYS    90/' /etc/login.defs && \
 COPY --from=development /opt/bitnami/ruby /opt/bitnami/ruby
 
 ENV BITNAMI_APP_NAME="ruby" \
-    BITNAMI_IMAGE_VERSION="2.5.5-debian-9-r20-prod" \
+    BITNAMI_IMAGE_VERSION="2.5.5-debian-9-r21-prod" \
     PATH="/opt/bitnami/ruby/bin:$PATH"
 
 CMD [ "irb" ]
diff --git a/bitnami/ruby/README.md b/bitnami/ruby/README.md
index 3b30ab3dd0ac..84cc8f5875da 100644
--- a/bitnami/ruby/README.md
+++ b/bitnami/ruby/README.md
@@ -53,8 +53,8 @@ Learn more about the Bitnami tagging policy and the difference between rolling t
 * [`2.6-debian-9`, `2.6.2-debian-9-r23`, `2.6`, `2.6.2`, `2.6.2-r23` (2.6/debian-9/Dockerfile)](https://github.com/bitnami/bitnami-docker-ruby/blob/2.6.2-debian-9-r23/2.6/debian-9/Dockerfile)
 * [`2.5-ol-7-prod`, `2.5.5-ol-7-r21-prod` (2.5-prod/ol-7/Dockerfile)](https://github.com/bitnami/bitnami-docker-ruby/blob/2.5.5-ol-7-r21-prod/2.5-prod/ol-7/Dockerfile)
 * [`2.5-ol-7`, `2.5.5-ol-7-r21` (2.5/ol-7/Dockerfile)](https://github.com/bitnami/bitnami-docker-ruby/blob/2.5.5-ol-7-r21/2.5/ol-7/Dockerfile)
+* [`2.5-debian-9-prod`, `2.5.5-debian-9-r21-prod`, `2.5-prod`, `2.5.5-prod`, `2.5.5-r21-prod`, `latest-prod` (2.5-prod/debian-9/Dockerfile)](https://github.com/bitnami/bitnami-docker-ruby/blob/2.5.5-debian-9-r21-prod/2.5-prod/debian-9/Dockerfile)
 * [`2.5-debian-9`, `2.5.5-debian-9-r21`, `2.5`, `2.5.5`, `2.5.5-r21`, `latest` (2.5/debian-9/Dockerfile)](https://github.com/bitnami/bitnami-docker-ruby/blob/2.5.5-debian-9-r21/2.5/debian-9/Dockerfile)
-* [`2.5-debian-9-prod`, `2.5.5-debian-9-r20-prod`, `2.5-prod`, `2.5.5-prod`, `2.5.5-r20-prod`, `latest-prod` (2.5-prod/debian-9/Dockerfile)](https://github.com/bitnami/bitnami-docker-ruby/blob/2.5.5-debian-9-r20-prod/2.5-prod/debian-9/Dockerfile)
 * [`2.4-ol-7-prod`, `2.4.6-ol-7-r4-prod` (2.4-prod/ol-7/Dockerfile)](https://github.com/bitnami/bitnami-docker-ruby/blob/2.4.6-ol-7-r4-prod/2.4-prod/ol-7/Dockerfile)
 * [`2.4-ol-7`, `2.4.6-ol-7-r4` (2.4/ol-7/Dockerfile)](https://github.com/bitnami/bitnami-docker-ruby/blob/2.4.6-ol-7-r4/2.4/ol-7/Dockerfile)
 * [`2.4-debian-9-prod`, `2.4.6-debian-9-r4-prod`, `2.4-prod`, `2.4.6-prod`, `2.4.6-r4-prod` (2.4-prod/debian-9/Dockerfile)](https://github.com/bitnami/bitnami-docker-ruby/blob/2.4.6-debian-9-r4-prod/2.4-prod/debian-9/Dockerfile)