diff --git a/Dockerfile b/Dockerfile
index 2bbc32f..aab1afc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM cloudron/base:3.0.0@sha256:455c70428723e3a823198c57472785437eb6eab082e79b3f
 RUN mkdir -p /app/code
 WORKDIR /app/code
 
-ARG VERSION=2.27.1
+ARG VERSION=2.28.0
 
 # install Prometheus
 RUN curl -L https://github.com/prometheus/prometheus/releases/download/v${VERSION}/prometheus-${VERSION}.linux-amd64.tar.gz | tar zxvf - --strip-components 1