diff --git a/config/config.go b/config/config.go
index d65ef294..2edc9a14 100644
--- a/config/config.go
+++ b/config/config.go
@@ -42,16 +42,17 @@ type Config struct {
 	Exploit    ExploitConf    `json:"exploit,omitempty"`
 	Metasploit MetasploitConf `json:"metasploit,omitempty"`
 
-	Slack    SlackConf    `json:"-"`
-	EMail    SMTPConf     `json:"-"`
-	HTTP     HTTPConf     `json:"-"`
-	Syslog   SyslogConf   `json:"-"`
-	AWS      AWSConf      `json:"-"`
-	Azure    AzureConf    `json:"-"`
-	ChatWork ChatWorkConf `json:"-"`
-	Telegram TelegramConf `json:"-"`
-	WpScan   WpScanConf   `json:"-"`
-	Saas     SaasConf     `json:"-"`
+	Slack      SlackConf      `json:"-"`
+	EMail      SMTPConf       `json:"-"`
+	HTTP       HTTPConf       `json:"-"`
+	Syslog     SyslogConf     `json:"-"`
+	AWS        AWSConf        `json:"-"`
+	Azure      AzureConf      `json:"-"`
+	ChatWork   ChatWorkConf   `json:"-"`
+	GoogleChat GoogleChatConf `json:"-"`
+	Telegram   TelegramConf   `json:"-"`
+	WpScan     WpScanConf     `json:"-"`
+	Saas       SaasConf       `json:"-"`
 
 	ReportOpts
 }
@@ -157,6 +158,7 @@ func (c *Config) ValidateOnReport() bool {
 		&c.EMail,
 		&c.Slack,
 		&c.ChatWork,
+		&c.GoogleChat,
 		&c.Telegram,
 		&c.Syslog,
 		&c.HTTP,
diff --git a/config/googlechatconf.go b/config/googlechatconf.go
new file mode 100644
index 00000000..5c5bad50
--- /dev/null
+++ b/config/googlechatconf.go
@@ -0,0 +1,32 @@
+package config
+
+import (
+	"github.com/asaskevich/govalidator"
+	"golang.org/x/xerrors"
+)
+
+// GoogleChatConf is GoogleChat config
+type GoogleChatConf struct {
+	WebHookURL       string `valid:"url" json:"-" toml:"webHookURL,omitempty"`
+	SkipIfNoCve      bool   `valid:"type(bool)" json:"-" toml:"skipIfNoCve"`
+	ServerNameRegexp string `valid:"type(string)" json:"-" toml:"serverNameRegexp,omitempty"`
+	Enabled          bool   `valid:"type(bool)" json:"-" toml:"-"`
+}
+
+// Validate validates configuration
+func (c *GoogleChatConf) Validate() (errs []error) {
+	if !c.Enabled {
+		return
+	}
+	if len(c.WebHookURL) == 0 {
+		errs = append(errs, xerrors.New("googleChatConf.webHookURL must not be empty"))
+	}
+	if !govalidator.IsRegex(c.ServerNameRegexp) {
+		errs = append(errs, xerrors.New("googleChatConf.serverNameRegexp must be regex"))
+	}
+	_, err := govalidator.ValidateStruct(c)
+	if err != nil {
+		errs = append(errs, err)
+	}
+	return
+}
diff --git a/constant/constant.go b/constant/constant.go
index f394aad3..e0d2e1f0 100644
--- a/constant/constant.go
+++ b/constant/constant.go
@@ -17,6 +17,9 @@ const (
 	// CentOS is
 	CentOS = "centos"
 
+	// Rocky is
+	Rocky = "Rocky"
+
 	// Fedora is
 	// Fedora = "fedora"
 
diff --git a/go.mod b/go.mod
index 4d7022ce..26699019 100644
--- a/go.mod
+++ b/go.mod
@@ -53,7 +53,7 @@ require (
 	github.com/spf13/cobra v1.1.3
 	github.com/spf13/viper v1.8.1 // indirect
 	github.com/takuzoo3868/go-msfdb v0.1.5
-	github.com/vulsio/go-exploitdb v0.1.7
+	github.com/vulsio/go-exploitdb v0.1.8-0.20210625021845-e5081ca67229
 	go.opentelemetry.io/otel/internal/metric v0.21.0 // indirect
 	golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e // indirect
 	golang.org/x/net v0.0.0-20210614182718-04defd469f4e // indirect
diff --git a/go.sum b/go.sum
index d115305f..d680fbe9 100644
--- a/go.sum
+++ b/go.sum
@@ -1417,8 +1417,8 @@ github.com/vmihailenco/msgpack v3.3.3+incompatible/go.mod h1:fy3FlTQTDXWkZ7Bh6Ac
 github.com/vmihailenco/msgpack/v4 v4.3.12/go.mod h1:gborTTJjAo/GWTqqRjrLCn9pgNN+NXzzngzBKDPIqw4=
 github.com/vmihailenco/tagparser v0.1.1/go.mod h1:OeAg3pn3UbLjkWt+rN9oFYB6u/cQgqMEUPoW2WPyhdI=
 github.com/vmware/govmomi v0.20.3/go.mod h1:URlwyTFZX72RmxtxuaFL2Uj3fD1JTvZdx59bHWk6aFU=
-github.com/vulsio/go-exploitdb v0.1.7 h1:wdq+6H/PvGGnUiyAaLQ3DtczsLy3rrBQgmNOiXH62z0=
-github.com/vulsio/go-exploitdb v0.1.7/go.mod h1:4strSWuNtCTz76QB8RuxpMQmYifArGKiHKBFCMOTxY4=
+github.com/vulsio/go-exploitdb v0.1.8-0.20210625021845-e5081ca67229 h1:fgwhSbKAPf0wnGwmrkjWyfUi48lMJhS6y8rqGPyHyJE=
+github.com/vulsio/go-exploitdb v0.1.8-0.20210625021845-e5081ca67229/go.mod h1:4strSWuNtCTz76QB8RuxpMQmYifArGKiHKBFCMOTxY4=
 github.com/wasmerio/go-ext-wasm v0.3.1/go.mod h1:VGyarTzasuS7k5KhSIGpM3tciSZlkP31Mp9VJTHMMeI=
 github.com/willf/bitset v1.1.10/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPySAYV4=
 github.com/willf/bitset v1.1.11-0.20200630133818-d5bec3311243/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPySAYV4=
diff --git a/gost/gost.go b/gost/gost.go
index d7313e35..7d6edc6c 100644
--- a/gost/gost.go
+++ b/gost/gost.go
@@ -74,7 +74,7 @@ func NewClient(cnf config.GostConf, family string) (Client, error) {
 	case constant.Windows:
 		return Microsoft{Base{DBDriver: driver}}, nil
 	default:
-		return Pseudo{}, nil
+		return Pseudo{Base{DBDriver: driver}}, nil
 	}
 }
 
diff --git a/oval/debian.go b/oval/debian.go
index c0926a23..d461336b 100644
--- a/oval/debian.go
+++ b/oval/debian.go
@@ -342,6 +342,47 @@ func (o Ubuntu) FillWithOval(r *models.ScanResult) (nCVEs int, err error) {
 			"linux",
 		}
 		return o.fillWithOval(r, kernelNamesInOval)
+	case "21":
+		kernelNamesInOval := []string{
+			"linux-aws",
+			"linux-base-sgx",
+			"linux-base",
+			"linux-cloud-tools-common",
+			"linux-cloud-tools-generic",
+			"linux-cloud-tools-lowlatency",
+			"linux-cloud-tools-virtual",
+			"linux-gcp",
+			"linux-generic",
+			"linux-gke",
+			"linux-headers-aws",
+			"linux-headers-gcp",
+			"linux-headers-gke",
+			"linux-headers-oracle",
+			"linux-image-aws",
+			"linux-image-extra-virtual",
+			"linux-image-gcp",
+			"linux-image-generic",
+			"linux-image-gke",
+			"linux-image-lowlatency",
+			"linux-image-oracle",
+			"linux-image-virtual",
+			"linux-lowlatency",
+			"linux-modules-extra-aws",
+			"linux-modules-extra-gcp",
+			"linux-modules-extra-gke",
+			"linux-oracle",
+			"linux-tools-aws",
+			"linux-tools-common",
+			"linux-tools-gcp",
+			"linux-tools-generic",
+			"linux-tools-gke",
+			"linux-tools-host",
+			"linux-tools-lowlatency",
+			"linux-tools-oracle",
+			"linux-tools-virtual",
+			"linux-virtual",
+		}
+		return o.fillWithOval(r, kernelNamesInOval)
 	}
 	return 0, fmt.Errorf("Ubuntu %s is not support for now", r.Release)
 }
diff --git a/reporter/googlechat.go b/reporter/googlechat.go
new file mode 100644
index 00000000..2c9fc680
--- /dev/null
+++ b/reporter/googlechat.go
@@ -0,0 +1,102 @@
+package reporter
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"net/http"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/future-architect/vuls/config"
+	"github.com/future-architect/vuls/models"
+	"github.com/future-architect/vuls/util"
+	"golang.org/x/xerrors"
+)
+
+// GoogleChatWriter send report to GoogleChat
+type GoogleChatWriter struct {
+	Cnf   config.GoogleChatConf
+	Proxy string
+}
+
+func (w GoogleChatWriter) Write(rs ...models.ScanResult) (err error) {
+	re := regexp.MustCompile(w.Cnf.ServerNameRegexp)
+
+	for _, r := range rs {
+		if re.Match([]byte(r.FormatServerName())) {
+			continue
+		}
+		msgs := []string{fmt.Sprintf("*%s*\n%s\t%s\t%s",
+			r.ServerInfo(),
+			r.ScannedCves.FormatCveSummary(),
+			r.ScannedCves.FormatFixedStatus(r.Packages),
+			r.FormatUpdatablePkgsSummary())}
+		for _, vinfo := range r.ScannedCves.ToSortedSlice() {
+			max := vinfo.MaxCvssScore().Value.Score
+
+			exploits := ""
+			if 0 < len(vinfo.Exploits) || 0 < len(vinfo.Metasploits) {
+				exploits = "*PoC*"
+			}
+
+			link := ""
+			if strings.HasPrefix(vinfo.CveID, "CVE-") {
+				link = fmt.Sprintf("https://nvd.nist.gov/vuln/detail/%s", vinfo.CveID)
+			} else if strings.HasPrefix(vinfo.CveID, "WPVDBID-") {
+				link = fmt.Sprintf("https://wpscan.com/vulnerabilities/%s", strings.TrimPrefix(vinfo.CveID, "WPVDBID-"))
+			}
+
+			msgs = append(msgs, fmt.Sprintf(`%s %s %4.1f %5s %s`,
+				vinfo.CveIDDiffFormat(),
+				link,
+				max,
+				vinfo.AttackVector(),
+				exploits))
+			if len(msgs) == 50 {
+				msgs = append(msgs, "(The rest is omitted.)")
+				break
+			}
+		}
+		if len(msgs) == 1 && w.Cnf.SkipIfNoCve {
+			msgs = []string{}
+		}
+		if len(msgs) != 0 {
+			if err = w.postMessage(strings.Join(msgs, "\n")); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (w GoogleChatWriter) postMessage(message string) error {
+	uri := fmt.Sprintf("%s", w.Cnf.WebHookURL)
+	payload := `{"text": "` + message + `" }`
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, uri, bytes.NewBuffer([]byte(payload)))
+	defer cancel()
+	if err != nil {
+		return err
+	}
+	req.Header.Add("Content-Type", "application/json; charset=utf-8")
+	client, err := util.GetHTTPClient(w.Proxy)
+	if err != nil {
+		return err
+	}
+	resp, err := client.Do(req)
+	if checkResponse(resp) != nil && err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	return nil
+}
+
+func (w GoogleChatWriter) checkResponse(r *http.Response) error {
+	if c := r.StatusCode; 200 <= c && c <= 299 {
+		return nil
+	}
+	return xerrors.Errorf("API call to %s failed: %s", r.Request.URL.String(), r.Status)
+}
diff --git a/scanner/redhatbase.go b/scanner/redhatbase.go
index b467f523..60d481f6 100644
--- a/scanner/redhatbase.go
+++ b/scanner/redhatbase.go
@@ -64,6 +64,27 @@ func detectRedhat(c config.ServerInfo) (bool, osTypeInterface) {
 		}
 	}
 
+	if r := exec(c, "ls /etc/rocky-release", noSudo); r.isSuccess() {
+		if r := exec(c, "cat /etc/rocky-release", noSudo); r.isSuccess() {
+			re := regexp.MustCompile(`(.*) release (\d[\d\.]*)`)
+			result := re.FindStringSubmatch(strings.TrimSpace(r.Stdout))
+			if len(result) != 3 {
+				logging.Log.Warnf("Failed to parse Rocky version: %s", r)
+				return true, newRocky(c)
+			}
+
+			release := result[2]
+			switch strings.ToLower(result[1]) {
+			case "rocky", "rocky linux":
+				rocky := newRocky(c)
+				rocky.setDistro(constant.Rocky, release)
+				return true, rocky
+			default:
+				logging.Log.Warnf("Failed to parse Rocky: %s", r)
+			}
+		}
+	}
+
 	if r := exec(c, "ls /etc/redhat-release", noSudo); r.isSuccess() {
 		// https://www.rackaid.com/blog/how-to-determine-centos-or-red-hat-version/
 		// e.g.
diff --git a/scanner/rocky.go b/scanner/rocky.go
new file mode 100644
index 00000000..922ff71b
--- /dev/null
+++ b/scanner/rocky.go
@@ -0,0 +1,118 @@
+package scanner
+
+import (
+	"github.com/future-architect/vuls/config"
+	"github.com/future-architect/vuls/logging"
+	"github.com/future-architect/vuls/models"
+)
+
+// inherit OsTypeInterface
+type rocky struct {
+	redhatBase
+}
+
+// NewAmazon is constructor
+func newRocky(c config.ServerInfo) *rocky {
+	r := &rocky{
+		redhatBase{
+			base: base{
+				osPackages: osPackages{
+					Packages:  models.Packages{},
+					VulnInfos: models.VulnInfos{},
+				},
+			},
+			sudo: rootPrivRocky{},
+		},
+	}
+	r.log = logging.NewNormalLogger()
+	r.setServerInfo(c)
+	return r
+}
+
+func (o *rocky) checkScanMode() error {
+	return nil
+}
+
+func (o *rocky) checkDeps() error {
+	if o.getServerInfo().Mode.IsFast() {
+		return o.execCheckDeps(o.depsFast())
+	} else if o.getServerInfo().Mode.IsFastRoot() {
+		return o.execCheckDeps(o.depsFastRoot())
+	} else {
+		return o.execCheckDeps(o.depsDeep())
+	}
+}
+
+func (o *rocky) depsFast() []string {
+	if o.getServerInfo().Mode.IsOffline() {
+		return []string{}
+	}
+
+	// repoquery
+	// `rpm -qa` shows dnf-utils as yum-utils on RHEL8, CentOS8, Rocky
+	return []string{"yum-utils"}
+}
+
+func (o *rocky) depsFastRoot() []string {
+	if o.getServerInfo().Mode.IsOffline() {
+		return []string{}
+	}
+
+	// repoquery
+	// `rpm -qa` shows dnf-utils as yum-utils on RHEL8, CentOS8, Rocky
+	return []string{"yum-utils"}
+}
+
+func (o *rocky) depsDeep() []string {
+	return o.depsFastRoot()
+}
+
+func (o *rocky) checkIfSudoNoPasswd() error {
+	if o.getServerInfo().Mode.IsFast() {
+		return o.execCheckIfSudoNoPasswd(o.sudoNoPasswdCmdsFast())
+	} else if o.getServerInfo().Mode.IsFastRoot() {
+		return o.execCheckIfSudoNoPasswd(o.sudoNoPasswdCmdsFastRoot())
+	} else {
+		return o.execCheckIfSudoNoPasswd(o.sudoNoPasswdCmdsDeep())
+	}
+}
+
+func (o *rocky) sudoNoPasswdCmdsFast() []cmd {
+	return []cmd{}
+}
+
+func (o *rocky) sudoNoPasswdCmdsFastRoot() []cmd {
+	if !o.ServerInfo.IsContainer() {
+		return []cmd{
+			{"repoquery -h", exitStatusZero},
+			{"needs-restarting", exitStatusZero},
+			{"which which", exitStatusZero},
+			{"stat /proc/1/exe", exitStatusZero},
+			{"ls -l /proc/1/exe", exitStatusZero},
+			{"cat /proc/1/maps", exitStatusZero},
+			{"lsof -i -P", exitStatusZero},
+		}
+	}
+	return []cmd{
+		{"repoquery -h", exitStatusZero},
+		{"needs-restarting", exitStatusZero},
+	}
+}
+
+func (o *rocky) sudoNoPasswdCmdsDeep() []cmd {
+	return o.sudoNoPasswdCmdsFastRoot()
+}
+
+type rootPrivRocky struct{}
+
+func (o rootPrivRocky) repoquery() bool {
+	return false
+}
+
+func (o rootPrivRocky) yumMakeCache() bool {
+	return false
+}
+
+func (o rootPrivRocky) yumPS() bool {
+	return false
+}
diff --git a/subcmds/discover.go b/subcmds/discover.go
index 7268e415..3d2b350a 100644
--- a/subcmds/discover.go
+++ b/subcmds/discover.go
@@ -157,6 +157,13 @@ func printConfigToml(ips []string) (err error) {
 #room     = "xxxxxxxxxxx"
 #apiToken = "xxxxxxxxxxxxxxxxxx"
 
+# https://vuls.io/docs/en/config.toml.html#googlechat-section
+#[googlechat]
+#webHookURL = "https://chat.googleapis.com/v1/spaces/xxxxxxxxxx/messages?key=yyyyyyyyyy&token=zzzzzzzzzz%3D"
+#skipIfNoCve = false
+#serverNameRegexp = "^(\\[Reboot Required\\] )?((spam|ham).*|.*(egg)$)" # include spamonigiri, hamburger, boiledegg
+#serverNameRegexp = "^(\\[Reboot Required\\] )?(?:(spam|ham).*|.*(?:egg)$)" # exclude spamonigiri, hamburger, boiledegg
+
 # https://vuls.io/docs/en/config.toml.html#telegram-section
 #[telegram]
 #chatID     = "xxxxxxxxxxx"
diff --git a/subcmds/report.go b/subcmds/report.go
index 3a0818f2..671aebd4 100644
--- a/subcmds/report.go
+++ b/subcmds/report.go
@@ -30,15 +30,16 @@ type ReportCmd struct {
 	formatList        bool
 	gzip              bool
 
-	toSlack     bool
-	toChatWork  bool
-	toTelegram  bool
-	toEmail     bool
-	toSyslog    bool
-	toLocalFile bool
-	toS3        bool
-	toAzureBlob bool
-	toHTTP      bool
+	toSlack      bool
+	toChatWork   bool
+	toGoogleChat bool
+	toTelegram   bool
+	toEmail      bool
+	toSyslog     bool
+	toLocalFile  bool
+	toS3         bool
+	toAzureBlob  bool
+	toHTTP       bool
 }
 
 // Name return subcommand name
@@ -67,6 +68,7 @@ func (*ReportCmd) Usage() string {
 		[-to-http]
 		[-to-slack]
 		[-to-chatwork]
+		[-to-googlechat]
 		[-to-telegram]
 		[-to-localfile]
 		[-to-s3]
@@ -146,6 +148,7 @@ func (p *ReportCmd) SetFlags(f *flag.FlagSet) {
 
 	f.BoolVar(&p.toSlack, "to-slack", false, "Send report via Slack")
 	f.BoolVar(&p.toChatWork, "to-chatwork", false, "Send report via chatwork")
+	f.BoolVar(&p.toGoogleChat, "to-googlechat", false, "Send report via Google Chat")
 	f.BoolVar(&p.toTelegram, "to-telegram", false, "Send report via Telegram")
 	f.BoolVar(&p.toEmail, "to-email", false, "Send report via Email")
 	f.BoolVar(&p.toSyslog, "to-syslog", false, "Send report via Syslog")
@@ -173,6 +176,7 @@ func (p *ReportCmd) Execute(_ context.Context, f *flag.FlagSet, _ ...interface{}
 	}
 	config.Conf.Slack.Enabled = p.toSlack
 	config.Conf.ChatWork.Enabled = p.toChatWork
+	config.Conf.GoogleChat.Enabled = p.toGoogleChat
 	config.Conf.Telegram.Enabled = p.toTelegram
 	config.Conf.EMail.Enabled = p.toEmail
 	config.Conf.Syslog.Enabled = p.toSyslog
@@ -261,6 +265,10 @@ func (p *ReportCmd) Execute(_ context.Context, f *flag.FlagSet, _ ...interface{}
 		reports = append(reports, reporter.ChatWorkWriter{Cnf: config.Conf.ChatWork, Proxy: config.Conf.HTTPProxy})
 	}
 
+	if p.toGoogleChat {
+		reports = append(reports, reporter.GoogleChatWriter{Cnf: config.Conf.GoogleChat, Proxy: config.Conf.HTTPProxy})
+	}
+
 	if p.toTelegram {
 		reports = append(reports, reporter.TelegramWriter{Cnf: config.Conf.Telegram})
 	}