diff --git a/.github/container/Dockerfile b/.github/container/Dockerfile
index b1c5aa5d1..1d238339a 100644
--- a/.github/container/Dockerfile
+++ b/.github/container/Dockerfile
@@ -1,5 +1,5 @@
 #' Define default build variables
-ARG OTP_VSN='27.3.4.2'
+ARG OTP_VSN='27.3.4.3'
 ARG ELIXIR_VSN='1.18.4'
 ARG UID='9000'
 ARG USER='ejabberd'
diff --git a/CONTAINER.md b/CONTAINER.md
index b17d4fb40..fefd96733 100644
--- a/CONTAINER.md
+++ b/CONTAINER.md
@@ -1072,7 +1072,7 @@ Let's summarize the differences between both container images. Legend:
 | Generated by          | [container.yml](https://github.com/processone/ejabberd/blob/master/.github/workflows/container.yml) | [tests.yml](https://github.com/processone/docker-ejabberd/blob/master/.github/workflows/tests.yml) |
 | Built for             | stable releases <br /> `master` branch | stable releases <br /> [`master` branch zip](https://github.com/processone/docker-ejabberd/actions/workflows/tests.yml) |
 | Architectures         | `linux/amd64` <br /> `linux/arm64` | `linux/amd64` |
-| Software              | Erlang/OTP 27.3.4.2-alpine <br /> Elixir 1.18.4 | Alpine 3.19 <br /> Erlang/OTP 26.2 <br /> Elixir 1.15.7 |
+| Software              | Erlang/OTP 27.3.4.3-alpine <br /> Elixir 1.18.4 | Alpine 3.19 <br /> Erlang/OTP 26.2 <br /> Elixir 1.15.7 |
 | Published in          | [ghcr.io/processone/ejabberd](https://github.com/processone/ejabberd/pkgs/container/ejabberd) | [docker.io/ejabberd/ecs](https://hub.docker.com/r/ejabberd/ecs/) <br /> [ghcr.io/processone/ecs](https://github.com/processone/docker-ejabberd/pkgs/container/ecs) |
 | :black_square_button: **Additional content** |
 | [ejabberd-contrib](#ejabberd-contrib) | included | not included |
diff --git a/tools/make-binaries b/tools/make-binaries
index d058e0649..3e0d8d9c3 100755
--- a/tools/make-binaries
+++ b/tools/make-binaries
@@ -71,7 +71,7 @@ expat_vsn='2.7.1'
 zlib_vsn='1.3.1'
 yaml_vsn='0.2.5'
 ssl_vsn='3.5.2'
-otp_vsn='27.3.4.2'
+otp_vsn='27.3.4.3'
 elixir_vsn='1.18.4'
 pam_vsn='1.6.1' # Newer Linux-PAM versions use Meson, we don't support that yet.
 png_vsn='1.6.45'