diff --git a/.github/workflows/part_test.yml b/.github/workflows/part_test.yml
index be60b8a..ab4ff26 100644
--- a/.github/workflows/part_test.yml
+++ b/.github/workflows/part_test.yml
@@ -71,6 +71,8 @@ jobs:
             unstable: false
           - elixir: "1.15.7"
             unstable: false
+          - elixir: "1.16.2"
+            unstable: false
           - elixir: "main"
             unstable: true
 
diff --git a/.tool-versions b/.tool-versions
index 28b65bf..5af6e7e 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-erlang 26.2
-elixir 1.15.7
+erlang 26.2.4
+elixir 1.16.2
diff --git a/mix.exs b/mix.exs
index c7f343e..c2ca04d 100644
--- a/mix.exs
+++ b/mix.exs
@@ -65,8 +65,8 @@ defmodule Oidcc.Plug.MixProject do
     [
       {:oidcc, "~> 3.0"},
       {:plug, "~> 1.14"},
-      {:ex_doc, "~> 0.29.4", only: :dev, runtime: false},
-      {:excoveralls, "~> 0.17.1", only: :test, runtime: false},
+      {:ex_doc, "~> 0.29", only: :dev, runtime: false},
+      {:excoveralls, "~> 0.18.1", only: :test, runtime: false},
       {:dialyxir, "~> 1.4", only: :dev, runtime: false},
       {:credo, "~> 1.7", only: :dev, runtime: false},
       {:mock, "~> 0.3.8", only: :test}