diff --git a/.github/workflows/part_test.yml b/.github/workflows/part_test.yml
index ab4ff26..40c3118 100644
--- a/.github/workflows/part_test.yml
+++ b/.github/workflows/part_test.yml
@@ -69,9 +69,13 @@ jobs:
         include:
           - elixir: "1.15.0"
             unstable: false
-          - elixir: "1.15.7"
+          - elixir: "1.15.8"
             unstable: false
-          - elixir: "1.16.2"
+          - elixir: "1.16.3"
+            unstable: false
+          - elixir: "1.17.3"
+            unstable: false
+          - elixir: "1.18.0"
             unstable: false
           - elixir: "main"
             unstable: true
diff --git a/.tool-versions b/.tool-versions
index 5af6e7e..2737972 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-erlang 26.2.4
-elixir 1.16.2
+erlang 27.2
+elixir 1.18.0
diff --git a/lib/oidcc/plug/introspect_token.ex b/lib/oidcc/plug/introspect_token.ex
index 9859ad8..540d21a 100644
--- a/lib/oidcc/plug/introspect_token.ex
+++ b/lib/oidcc/plug/introspect_token.ex
@@ -54,9 +54,9 @@ defmodule Oidcc.Plug.IntrospectToken do
           client_id: String.t() | (-> String.t()),
           client_secret: String.t() | (-> String.t()),
           token_introspection_opts: :oidcc_token_introspection.opts(),
-          send_inactive_token_response:
-            (conn :: Plug.Conn.t(), introspection :: Oidcc.TokenIntrospection.t() ->
-               Plug.Conn.t()),
+          send_inactive_token_response: (conn :: Plug.Conn.t(),
+                                         introspection :: Oidcc.TokenIntrospection.t() ->
+                                           Plug.Conn.t()),
           cache: Oidcc.Plug.Cache.t()
         ]