diff --git a/docker/Dockerfile-alpine-320 b/docker/Dockerfile-alpine-320
index d095828..2a33a64 100644
--- a/docker/Dockerfile-alpine-320
+++ b/docker/Dockerfile-alpine-320
@@ -1,4 +1,4 @@
-FROM alpine:3.20
+FROM alpine:3.20.3
 
 ARG R_VERSION=4.4.1
 ENV PATH=/opt/R/${R_VERSION}/bin:$PATH