diff --git a/images/masterportal-v2/Dockerfile b/images/masterportal-v2/Dockerfile
index fc12614b..643b9a5e 100644
--- a/images/masterportal-v2/Dockerfile
+++ b/images/masterportal-v2/Dockerfile
@@ -1,4 +1,4 @@
-FROM nginx:1.30.0-alpine@sha256:0272e4604ed93c1792f03695a033a6e8546840f86e0de20a884bb17d2c924883
+FROM nginx:1.31.2-alpine@sha256:54f2a904c251d5a34adf545a72d32515a15e08418dae0266e23be2e18c66fefa
 
 # renovate: datasource=bitbucket-tags depName=geowerkstatt-hamburg/masterportal extractVersion=^v(?<version>2.*)$
 ENV MASTERPORTAL_VERSION=2.52.0
diff --git a/images/masterportal-v3/Dockerfile b/images/masterportal-v3/Dockerfile
index a9eb6014..c91df89e 100644
--- a/images/masterportal-v3/Dockerfile
+++ b/images/masterportal-v3/Dockerfile
@@ -1,4 +1,4 @@
-FROM nginx:1.30.0-alpine@sha256:0272e4604ed93c1792f03695a033a6e8546840f86e0de20a884bb17d2c924883
+FROM nginx:1.31.2-alpine@sha256:54f2a904c251d5a34adf545a72d32515a15e08418dae0266e23be2e18c66fefa
 
 # renovate: datasource=bitbucket-tags depName=geowerkstatt-hamburg/masterportal extractVersion=^v(?<version>3.*)$
 ENV MASTERPORTAL_VERSION=3.21.1