diff --git a/config/service/letsencrypt/Containerfile b/config/service/letsencrypt/Containerfile
index 6f24a11..5422ce4 100644
--- a/config/service/letsencrypt/Containerfile
+++ b/config/service/letsencrypt/Containerfile
@@ -3,7 +3,7 @@ FROM docker.io/goacme/lego:v4.4.0
 RUN addgroup --system --gid 10000 letsencrypt
 RUN adduser --system --uid 10000 --ingroup letsencrypt --home /var/lib/letsencrypt letsencrypt
 
-RUN apk --no-cache --no-progress add gosu
+RUN apk --no-cache --no-progress add su-exec
 COPY container/run-lego /run-lego
 
 ENTRYPOINT ["/run-lego"]
diff --git a/config/service/letsencrypt/container/run-lego b/config/service/letsencrypt/container/run-lego
index 5dfc875..3205438 100755
--- a/config/service/letsencrypt/container/run-lego
+++ b/config/service/letsencrypt/container/run-lego
@@ -4,4 +4,4 @@
 chown -R letsencrypt:letsencrypt /var/lib/letsencrypt
 
 # Run ACME verification with parameters given.
-gosu letsencrypt /usr/bin/lego "$@"
+su-exec letsencrypt /usr/bin/lego "$@"