diff --git a/README.md b/README.md
index 4b516c40d..632087b73 100644
--- a/README.md
+++ b/README.md
@@ -115,8 +115,8 @@ FILTERING:
    -eid, -exclude-id string[]        templates to exclude based on template ids (comma-separated, file)
    -it, -include-templates string[]  templates to be executed even if they are excluded either by default or configuration
    -et, -exclude-templates string[]  template or template directory to exclude (comma-separated, file)
-   -s, -severity value[]             templates to run based on severity. Possible values: info, low, medium, high, critical
-   -es, -exclude-severity value[]    templates to exclude based on severity. Possible values: info, low, medium, high, critical
+   -s, -severity value[]             templates to run based on severity. Possible values: info, low, medium, high, critical, unknown
+   -es, -exclude-severity value[]    templates to exclude based on severity. Possible values: info, low, medium, high, critical, unknown
    -pt, -type value[]                templates to run based on protocol type. Possible values: dns, file, http, headless, network, workflow, ssl, websocket, whois
    -ept, -exclude-type value[]       templates to exclude based on protocol type. Possible values: dns, file, http, headless, network, workflow, ssl, websocket, whois
 
diff --git a/v2/pkg/model/types/severity/severity.go b/v2/pkg/model/types/severity/severity.go
index 5c3b28150..d840d9558 100644
--- a/v2/pkg/model/types/severity/severity.go
+++ b/v2/pkg/model/types/severity/severity.go
@@ -24,6 +24,8 @@ const (
 	High
 	// name:critical
 	Critical
+	// name:unknown
+	Unknown
 	limit
 )
 
@@ -33,6 +35,7 @@ var severityMappings = map[Severity]string{
 	Medium:   "medium",
 	High:     "high",
 	Critical: "critical",
+	Unknown:  "unknown",
 }
 
 func GetSupportedSeverities() Severities {
diff --git a/v2/pkg/model/types/severity/severity_test.go b/v2/pkg/model/types/severity/severity_test.go
index 6ba472388..30ff4be94 100644
--- a/v2/pkg/model/types/severity/severity_test.go
+++ b/v2/pkg/model/types/severity/severity_test.go
@@ -26,7 +26,7 @@ func TestYamlUnmarshalFail(t *testing.T) {
 
 func TestGetSupportedSeverities(t *testing.T) {
 	severities := GetSupportedSeverities()
-	assert.Equal(t, severities, Severities{Info, Low, Medium, High, Critical})
+	assert.Equal(t, severities, Severities{Info, Low, Medium, High, Critical, Unknown})
 }
 
 func testUnmarshal(t *testing.T, unmarshaller func(data []byte, v interface{}) error, payloadCreator func(value string) string) {