diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a955ae6d..e4fa81f9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
       - uses: erlef/setup-beam@v1
         with:
           otp-version: 26.1.x
-          elixir-version: 1.14.x
+          elixir-version: 1.15.x
       - name: Retrieve dependencies cache
         uses: actions/cache@v3
         id: mix-cache # id to use in retrieve action
@@ -33,21 +33,11 @@ jobs:
     name: OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
     strategy:
       matrix:
-        otp: [23.x, 24.x, 25.1.x, 26.1.x]
-        elixir: [1.12.x, 1.13.x, 1.14.x, 1.15.x]
-        exclude:
-          - otp: 25.1.x
-            elixir: 1.12.x
-          - otp: 26.1.x
+        otp: [24.x, 25.x, 26.1.x]
+        elixir: [1.15.x]
+        include:
+          - otp: 24.x
             elixir: 1.12.x
-          - otp: 25.1.x
-            elixir: 1.13.x
-          - otp: 26.1.x
-            elixir: 1.13.x
-          - otp: 26.1.x
-            elixir: 1.14.x
-          - otp: 23.x
-            elixir: 1.15.x
     needs: check_format
     steps:
       - uses: actions/checkout@v3
@@ -96,21 +86,11 @@ jobs:
     if: ${{ github.ref == 'refs/heads/master' }}
     strategy:
       matrix:
-        otp: [23.x, 24.x, 25.1.x, 26.1.x]
-        elixir: [1.12.x, 1.13.x, 1.14.x, 1.15.x]
-        exclude:
-          - otp: 25.1.x
-            elixir: 1.12.x
-          - otp: 26.1.x
+        otp: [24.x, 25.x, 26.1.x]
+        elixir: [1.15.x]
+        include:
+          - otp: 24.x
             elixir: 1.12.x
-          - otp: 25.1.x
-            elixir: 1.13.x
-          - otp: 26.1.x
-            elixir: 1.13.x
-          - otp: 26.1.x
-            elixir: 1.14.x
-          - otp: 23.x
-            elixir: 1.15.x
     steps:
       - uses: actions/checkout@v3
       - uses: erlef/setup-beam@v1