diff --git a/Dockerfile b/Dockerfile
index 11f3671..7981aac 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 # Multi-stage build for Phoenix/Elixir app with monorepo layout
 
 ARG ELIXIR_VERSION=1.20.4
-ARG OTP_VERSION=27.2.4
+ARG OTP_VERSION=27.3.4.19
 ARG DEBIAN_VERSION=bookworm-20261020-slim
 
 ARG BUILDER_IMAGE="docker.io/hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
diff --git a/mise.toml b/mise.toml
index b0788d0..ecc800c 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,5 +1,5 @@
 [tools]
-elixir = "latest"
-erlang = "latest"
+elixir = "1.20.4-otp-27"
+erlang = "27.3.4.19"
 node = "latest"
-go = "1.26"
+go = "1.27"