diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 349b62a..5c966b7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,7 +4,7 @@ jobs:
   build:
     strategy:
       matrix:
-        go-version: [1.17.x, 1.18.x, 1.19.x, 1.20.x]
+        go-version: [1.17.x, 1.18.x, 1.19.x, 1.20.x, 1.21.x]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 102cd3a..eef28f2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -4,7 +4,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.17.x, 1.18.x, 1.19.x, 1.20.x]
+        go-version: [1.17.x, 1.18.x, 1.19.x, 1.20.x, 1.21.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
@@ -26,7 +26,7 @@ jobs:
     needs: test
     strategy:
       matrix:
-        go-version: [1.17.x, 1.18.x, 1.19.x, 1.20.x]
+        go-version: [1.17.x, 1.18.x, 1.19.x, 1.20.x, 1.21.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/README.md b/README.md
index b73d7a6..60aa63d 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ go get github.com/savsgio/atreugo/v11
 
 ## Supported Go versions:
 
+- 1.21.x
 - 1.20.x
 - 1.19.x
 - 1.18.x