diff --git a/server.dockerfile b/server.dockerfile
index ecc92b3..32dfa3a 100644
--- a/server.dockerfile
+++ b/server.dockerfile
@@ -49,7 +49,7 @@ COPY rel rel
 RUN mix release
 
 # app stage
-FROM alpine:3.21 AS app
+FROM alpine:3.22 AS app
 
 # install runtime dependencies
 RUN apk add --no-cache libstdc++ openssl ncurses-libs musl-locales