diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 295ae9c..cb80ed1 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: ["1.20", "1.21", "1.22"]
+        go-version: ["1.21", "1.22"]
 
     steps:
     - uses: actions/checkout@v4
diff --git a/go.mod b/go.mod
index 54a8487..53f178e 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/timewarrior-synchronize/timew-sync-server
 
-go 1.20
+go 1.21
 
 require (
 	github.com/DATA-DOG/go-sqlmock v1.5.2