diff --git a/.tool-versions b/.tool-versions
index cbbf724be..fdcd001c9 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,3 +1,3 @@
-erlang 28.4
+erlang 28.4.1
 elixir 1.19.5
 node 24.10.0
diff --git a/Dockerfile b/Dockerfile
index a59891963..65a285692 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@
 # renovate: datasource=github-tags depName=elixir packageName=elixir-lang/elixir versioning=semver
 ARG ELIXIR_VERSION=1.19.5
 # renovate: datasource=github-tags depName=erlang packageName=erlang/otp versioning=regex:^(?<major>\d+?)\.(?<minor>\d+?)(\.(?<patch>\d+))?$ extractVersion=^OTP-(?<version>\S+)
-ARG OTP_VERSION=28.4
+ARG OTP_VERSION=28.4.1
 # renovate: datasource=docker depName=ubuntu packageName=ubuntu versioning=ubuntu
 ARG UBUNTU_VERSION=noble-20260210.1