diff --git a/.github/workflows/mix-test.yml b/.github/workflows/mix-test.yml
index 0a16635..3a112a2 100644
--- a/.github/workflows/mix-test.yml
+++ b/.github/workflows/mix-test.yml
@@ -6,7 +6,7 @@ on:
       - master
   pull_request:
     branches:
-      - '**'
+      - "**"
 
 env:
   MIX_ENV: test
@@ -17,16 +17,18 @@ jobs:
     strategy:
       matrix:
         include:
-          - elixir: '1.13.4'
-            otp: '25.3'
-          - elixir: '1.14.5'
-            otp: '26.2'
-          - elixir: '1.15.8'
-            otp: '26.2'
-          - elixir: '1.16.3'
-            otp: '26.2'
-          - elixir: '1.17.2'
-            otp: '27.0'
+          - elixir: "1.13.4"
+            otp: "25.3"
+          - elixir: "1.14.5"
+            otp: "26.2"
+          - elixir: "1.15.8"
+            otp: "26.2"
+          - elixir: "1.16.3"
+            otp: "26.2"
+          - elixir: "1.17.2"
+            otp: "27.0"
+          - elixir: "1.18.4"
+            otp: "28.0.2"
 
     steps:
       - name: Checkout code
diff --git a/.tool-versions b/.tool-versions
index ecec375..e94fa4c 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-erlang 27.0.1
-elixir 1.17.2-otp-26
+erlang 28.0.2
+elixir 1.18.4-otp-26