diff --git a/config/os.go b/config/os.go
index d26d7fcd..1defe412 100644
--- a/config/os.go
+++ b/config/os.go
@@ -110,6 +110,7 @@ func GetEOL(family, release string) (eol EOL, found bool) {
 			"8":  {Ended: true},
 			"9":  {StandardSupportUntil: time.Date(2022, 6, 30, 23, 59, 59, 0, time.UTC)},
 			"10": {StandardSupportUntil: time.Date(2024, 6, 30, 23, 59, 59, 0, time.UTC)},
+			"11": {StandardSupportUntil: time.Date(2026, 6, 30, 23, 59, 59, 0, time.UTC)},
 		}[major(release)]
 	case constant.Raspbian:
 		// Not found
diff --git a/config/os_test.go b/config/os_test.go
index 9f00ee4e..20965712 100644
--- a/config/os_test.go
+++ b/config/os_test.go
@@ -290,6 +290,14 @@ func TestEOL_IsStandardSupportEnded(t *testing.T) {
 			now:      time.Date(2021, 1, 6, 23, 59, 59, 0, time.UTC),
 			stdEnded: false,
 			extEnded: false,
+			found:    true,
+		},
+		{
+			name:     "Debian 12 is not supported yet",
+			fields:   fields{family: Debian, release: "12"},
+			now:      time.Date(2021, 1, 6, 23, 59, 59, 0, time.UTC),
+			stdEnded: false,
+			extEnded: false,
 			found:    false,
 		},
 		//alpine
diff --git a/gost/debian.go b/gost/debian.go
index 699c57eb..aa463ede 100644
--- a/gost/debian.go
+++ b/gost/debian.go
@@ -31,6 +31,7 @@ func (deb Debian) supported(major string) bool {
 		"8":  "jessie",
 		"9":  "stretch",
 		"10": "buster",
+		"11": "bullseye",
 	}[major]
 	return ok
 }
diff --git a/gost/debian_test.go b/gost/debian_test.go
index 8c7a799c..d0cf665e 100644
--- a/gost/debian_test.go
+++ b/gost/debian_test.go
@@ -39,10 +39,17 @@ func TestDebian_Supported(t *testing.T) {
 			want: true,
 		},
 		{
-			name: "11 is not supported yet",
+			name: "11 is supported",
 			args: args{
 				major: "11",
 			},
+			want: true,
+		},
+		{
+			name: "12 is not supported yet",
+			args: args{
+				major: "12",
+			},
 			want: false,
 		},
 		{