diff --git a/.github/workflows/pull_request.yaml b/.github/workflows/pull_request.yaml
index 1da794c..9c2998c 100644
--- a/.github/workflows/pull_request.yaml
+++ b/.github/workflows/pull_request.yaml
@@ -7,7 +7,7 @@ jobs:
   ci:
     strategy:
       matrix:
-        go-version: [ 1.18, 1.19 ]
+        go-version: [ 1.21.3 ]
         os: [ ubuntu-latest ]
     runs-on: ${{ matrix.os }}
     steps: