diff --git a/Dockerfile b/Dockerfile
index b6715d7..d5b08d5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@ RUN gcc -static -o membarrier_check membarrier_check.c
 RUN strip membarrier_check
 
 # Pull base image.
-FROM jlesage/baseimage-gui:alpine-3.12-v3.5.7
+FROM jlesage/baseimage-gui:alpine-3.15-v3.5.8
 
 # Docker image version is provided via build arg.
 ARG DOCKER_IMAGE_VERSION=unknown