diff --git a/README.md b/README.md
index 8a5552de..f0131840 100644
--- a/README.md
+++ b/README.md
@@ -177,6 +177,10 @@ For more information such as Installation, Tutorial, Usage, visit [vuls.io](http
 
 kotakanbe ([@kotakanbe](https://twitter.com/kotakanbe)) created vuls and [these fine people](https://github.com/future-architect/vuls/graphs/contributors) have contributed.
 
+## Contribute
+
+see [vulsdoc](https://vuls.io/docs/en/how-to-contribute.html)
+
 ----
 
 ## Stargazers over time
diff --git a/config/os.go b/config/os.go
index 4d8e0631..30b7f5d6 100644
--- a/config/os.go
+++ b/config/os.go
@@ -216,6 +216,7 @@ func GetEOL(family, release string) (eol EOL, found bool) {
 			"3.10": {StandardSupportUntil: time.Date(2021, 5, 1, 23, 59, 59, 0, time.UTC)},
 			"3.11": {StandardSupportUntil: time.Date(2021, 11, 1, 23, 59, 59, 0, time.UTC)},
 			"3.12": {StandardSupportUntil: time.Date(2022, 5, 1, 23, 59, 59, 0, time.UTC)},
+			"3.13": {StandardSupportUntil: time.Date(2022, 11, 1, 23, 59, 59, 0, time.UTC)},
 		}[majorDotMinor(release)]
 	case FreeBSD:
 		// https://www.freebsd.org/security/
diff --git a/config/os_test.go b/config/os_test.go
index 6838a2c0..87ea93a3 100644
--- a/config/os_test.go
+++ b/config/os_test.go
@@ -258,7 +258,7 @@ func TestEOL_IsStandardSupportEnded(t *testing.T) {
 			found:    true,
 		},
 		{
-			name:     "Debian 3.9 eol",
+			name:     "Alpine 3.9 eol",
 			fields:   fields{family: Alpine, release: "3.9"},
 			now:      time.Date(2021, 1, 6, 23, 59, 59, 0, time.UTC),
 			stdEnded: true,
@@ -266,8 +266,8 @@ func TestEOL_IsStandardSupportEnded(t *testing.T) {
 			found:    true,
 		},
 		{
-			name:     "Debian 3.13 not found",
-			fields:   fields{family: Alpine, release: "3.13"},
+			name:     "Alpine 3.14 not found",
+			fields:   fields{family: Alpine, release: "3.14"},
 			now:      time.Date(2021, 1, 6, 23, 59, 59, 0, time.UTC),
 			stdEnded: false,
 			extEnded: false,