diff --git a/.github/workflows/bench-go.yml b/.github/workflows/bench-go.yml
index 819d55fe..95ac0c0f 100644
--- a/.github/workflows/bench-go.yml
+++ b/.github/workflows/bench-go.yml
@@ -22,7 +22,7 @@ jobs:
     strategy:
       matrix:
         os-version: [ 'ubuntu-latest' ]
-        go-version: [ '1.21', '1.22', '1.23' ]
+        go-version: [ '1.22', '1.23' ]
     runs-on: ${{ matrix.os-version }}
 
     steps:
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8ab1e5c7..6f7dc7b5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -23,7 +23,7 @@ jobs:
     
     strategy:
       matrix:
-        go-version: ['1.21', '1.22', '1.23']
+        go-version: ['1.22', '1.23']
 
     steps:
       - uses: actions/checkout@v4
@@ -50,7 +50,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        go-version: ['1.21', '1.22', '1.23']
+        go-version: ['1.22', '1.23']
         goos: [linux, freebsd, darwin, windows]
         exclude:
           - { os: macos-latest, goos: linux }
diff --git a/README.md b/README.md
index ec6cdc08..9adc627c 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,9 @@
 <p align="center">
   <img src="https://goreportcard.com/badge/github.com/dmachard/go-dns-collector" alt="Go Report"/>
-  <img src="https://img.shields.io/badge/go%20version-min%201.21-green" alt="Go version"/>
-  <img src="https://img.shields.io/badge/go%20tests-521-green" alt="Go tests"/>
+  <img src="https://img.shields.io/badge/go%20version-min%201.22-green" alt="Go version"/>
+  <img src="https://img.shields.io/badge/go%20tests-527-green" alt="Go tests"/>
   <img src="https://img.shields.io/badge/go%20bench-21-green" alt="Go bench"/>
-  <img src="https://img.shields.io/badge/go%20lines-32844-green" alt="Go lines"/>
+  <img src="https://img.shields.io/badge/go%20lines-33484-green" alt="Go lines"/>
 </p>
 
 <p align="center">