diff --git a/test/Dockerfile.ssh-server b/test/Dockerfile.ssh-server
index 23c721d..a46ae3a 100644
--- a/test/Dockerfile.ssh-server
+++ b/test/Dockerfile.ssh-server
@@ -1,4 +1,4 @@
-FROM alpine:3.16@sha256:bc41182d7ef5ffc53a40b044e725193bc10142a1243f395ee852a8d9730fc2ad
+FROM alpine:3.18@sha256:02bb6f428431fbc2809c5d1b41eab5a68350194fb508869a33cb1af4444c9b11
 
 # renovate: datasource=repology depName=alpine_3_18/openssh versioning=loose
 ENV OPENSSH_VERSION=9.3_p1-r3