diff --git a/samples/Dockerfile b/samples/Dockerfile
index e1e7e26c..9380ec86 100644
--- a/samples/Dockerfile
+++ b/samples/Dockerfile
@@ -1,2 +1,2 @@
-FROM alpine:3.14.0
+FROM alpine:3.18.12
 RUN echo "testuser:x:10999:10999:,,,:/home/testuser:/bin/bash" >> /etc/passwd && echo "testuser::18761:0:99999:7:::" >> /etc/shadow