diff --git a/tests/auxiliary/smtplistener/Dockerfile b/tests/auxiliary/smtplistener/Dockerfile
index 8c674c2d4..ba4558006 100644
--- a/tests/auxiliary/smtplistener/Dockerfile
+++ b/tests/auxiliary/smtplistener/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/library/golang:1.14 AS builder
+FROM docker.io/library/golang:1.23 AS builder
 
 WORKDIR /app
 COPY . .