diff --git a/test/images/agnhost/BASEIMAGE b/test/images/agnhost/BASEIMAGE
index 66c7329c6a9..cdbf8b4afef 100644
--- a/test/images/agnhost/BASEIMAGE
+++ b/test/images/agnhost/BASEIMAGE
@@ -1,7 +1,7 @@
-linux/amd64=alpine:3.19
-linux/arm=arm32v6/alpine:3.19
-linux/arm64=arm64v8/alpine:3.19
-linux/ppc64le=ppc64le/alpine:3.19
-linux/s390x=s390x/alpine:3.19
+linux/amd64=alpine:3.21
+linux/arm=arm32v6/alpine:3.21
+linux/arm64=arm64v8/alpine:3.21
+linux/ppc64le=ppc64le/alpine:3.21
+linux/s390x=s390x/alpine:3.21
 windows/amd64/1809=REGISTRY/busybox:1.29-2-windows-amd64-1809
 windows/amd64/ltsc2022=REGISTRY/busybox:1.29-2-windows-amd64-ltsc2022
diff --git a/test/images/agnhost/Dockerfile_windows b/test/images/agnhost/Dockerfile_windows
index 1655a69db57..f2b50fb0700 100644
--- a/test/images/agnhost/Dockerfile_windows
+++ b/test/images/agnhost/Dockerfile_windows
@@ -17,7 +17,7 @@ ARG REGISTRY
 ARG OS_VERSION
 
 # We're using a Linux image to unpack the archives, then we're copying them over to Windows.
-FROM --platform=linux/amd64 alpine:3.6 as prep
+FROM --platform=linux/amd64 alpine:3.21 as prep
 
 ADD https://github.com/coredns/coredns/releases/download/v1.5.0/coredns_1.5.0_windows_amd64.tgz /coredns.tgz
 ADD https://iperf.fr/download/windows/iperf-2.0.9-win64.zip /iperf.zip
diff --git a/test/images/agnhost/VERSION b/test/images/agnhost/VERSION
index d74a9d37b71..d9949ce0266 100644
--- a/test/images/agnhost/VERSION
+++ b/test/images/agnhost/VERSION
@@ -1 +1 @@
-2.54
+2.55