diff --git a/Dockerfile b/Dockerfile
index b5344e5..c753647 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # --- Builder Stage ---
-FROM golang:1.24-alpine AS builder
+FROM golang:1.25-alpine AS builder
 
 # Arbeitsverzeichnis
 WORKDIR /app
diff --git a/go.mod b/go.mod
index 474b2d7..d67923e 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module git.send.nrw/sendnrw/go-ipv6-calculator
 
-go 1.24.4
+go 1.25.3