diff --git a/docker/Dockerfile.flux b/docker/Dockerfile.flux
index 6840bd05a..06f4b263a 100644
--- a/docker/Dockerfile.flux
+++ b/docker/Dockerfile.flux
@@ -1,4 +1,4 @@
-FROM alpine:3.9
+FROM alpine:3.21.0
 
 WORKDIR /home/flux