diff --git a/debug.go b/debug.go
index ae346e9c..62085c5d 100644
--- a/debug.go
+++ b/debug.go
@@ -13,7 +13,7 @@ import (
 	"sync/atomic"
 )
 
-const ginSupportMinGoVer = 18
+const ginSupportMinGoVer = 21
 
 // IsDebugging returns true if the framework is running in debug mode.
 // Use SetMode(gin.ReleaseMode) to disable debug mode.
@@ -78,7 +78,7 @@ func getMinVer(v string) (uint64, error) {
 
 func debugPrintWARNINGDefault() {
 	if v, e := getMinVer(runtime.Version()); e == nil && v < ginSupportMinGoVer {
-		debugPrint(`[WARNING] Now Gin requires Go 1.20+.
+		debugPrint(`[WARNING] Now Gin requires Go 1.21+.
 
 `)
 	}
diff --git a/debug_test.go b/debug_test.go
index e3909729..1e576681 100644
--- a/debug_test.go
+++ b/debug_test.go
@@ -104,7 +104,7 @@ func TestDebugPrintWARNINGDefault(t *testing.T) {
 	})
 	m, e := getMinVer(runtime.Version())
 	if e == nil && m < ginSupportMinGoVer {
-		assert.Equal(t, "[GIN-debug] [WARNING] Now Gin requires Go 1.20+.\n\n[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
+		assert.Equal(t, "[GIN-debug] [WARNING] Now Gin requires Go 1.21+.\n\n[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
 	} else {
 		assert.Equal(t, "[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
 	}