diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index db30425..aa40f0a 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: ["1.18", "1.19", "1.20", "1.21", "1.22"]
+        go: ["1.21", "1.22"]
     steps:
     - name: Set up Go ${{ matrix.go }}
       uses: actions/setup-go@v4
diff --git a/go.mod b/go.mod
index 539684c..5e23007 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/hahwul/jwt-hack
 
-go 1.18
+go 1.21
 
 require (
 	github.com/briandowns/spinner v1.23.0