diff --git a/bitnami/prometheus/2/Dockerfile b/bitnami/prometheus/2/Dockerfile
index 65d34229e172..72d07a624f68 100644
--- a/bitnami/prometheus/2/Dockerfile
+++ b/bitnami/prometheus/2/Dockerfile
@@ -13,7 +13,7 @@ LABEL maintainer "Bitnami <containers@bitnami.com>"
 
 COPY --from=buildenv /opt/bitnami/prometheus /opt/bitnami/prometheus
 ENV BITNAMI_APP_NAME="prometheus" \
-    BITNAMI_IMAGE_VERSION="2.3.1-debian-8-r20" \
+    BITNAMI_IMAGE_VERSION="2.3.1-debian-8-r21" \
     PATH="/opt/bitnami/prometheus/bin:$PATH"
 
 RUN mkdir -p /opt/bitnami/prometheus/data/ && chmod g+rwX /opt/bitnami/prometheus/data/
diff --git a/bitnami/prometheus/README.md b/bitnami/prometheus/README.md
index b14735950ed5..47a0edd2d98f 100644
--- a/bitnami/prometheus/README.md
+++ b/bitnami/prometheus/README.md
@@ -35,7 +35,7 @@ $ docker run --name prometheus bitnami/prometheus:latest
 
 * [`2-ol-7`, `2.3.1-ol-7-r17` (2/ol-7/Dockerfile)](https://github.com/bitnami/bitnami-docker-prometheus/blob/2.3.1-ol-7-r17/2/ol-7/Dockerfile)
 * [`2-debian-9`, `2.3.1-debian-9-r3`, `2`, `2.3.1`, `2.3.1-r3`, `latest` (2/Dockerfile)](https://github.com/bitnami/bitnami-docker-prometheus/blob/2.3.1-debian-9-r3/2/Dockerfile)
-* [`2-debian-8`, `2.3.1-debian-8-r20` (2/debian-8/Dockerfile)](https://github.com/bitnami/bitnami-docker-prometheus/blob/2.3.1-debian-8-r20/2/debian-8/Dockerfile)
+* [`2-debian-8`, `2.3.1-debian-8-r21` (2/debian-8/Dockerfile)](https://github.com/bitnami/bitnami-docker-prometheus/blob/2.3.1-debian-8-r21/2/debian-8/Dockerfile)
 
 Subscribe to project updates by watching the [bitnami/prometheus GitHub repo](https://github.com/bitnami/bitnami-docker-prometheus).