diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f03bed5..486b372 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
     name: Build
     strategy:
       matrix:
-        go-version: [1.20.x, 1.19.x]
+        go-version: [1.21.x, 1.20.x]
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     steps:
diff --git a/go.mod b/go.mod
index 7b2d0d9..f7d2ff5 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-pdf/fpdf
 
-go 1.19
+go 1.20
 
 retract (
 	// v1.4.3 was tagged to retract v1.4.2