diff --git a/Dockerfile b/Dockerfile
index b586ed1..11f3671 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,9 @@
 # Dockerfile for Dokku deployment
 # Multi-stage build for Phoenix/Elixir app with monorepo layout
 
-ARG ELIXIR_VERSION=1.18.3
+ARG ELIXIR_VERSION=1.20.4
 ARG OTP_VERSION=27.2.4
-ARG DEBIAN_VERSION=bookworm-20260316-slim
+ARG DEBIAN_VERSION=bookworm-20261020-slim
 
 ARG BUILDER_IMAGE="docker.io/hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
 ARG RUNNER_IMAGE="docker.io/debian:${DEBIAN_VERSION}"