Detect type of aud in MapClaims

map_claims.go

@@ -13,7 +13,17 @@ type MapClaims map[string]interface{}
 // Compares the aud claim against cmp.
 // If required is false, this method will return true if the value matches or is unset
 func (m MapClaims) VerifyAudience(cmp string, req bool) bool {
-	aud, _ := m["aud"].(Audience)
+
+	aud := Audience{}
+	switch m["aud"].(type) {
+		case string:
+			aud = Audience{m["aud"].(string)}
+		case interface{}:
+			for _, s := range m["aud"].([]interface{}) {
+				aud = append(aud, s.(string))
+			}
+	}
+
 	return verifyAud(aud, []string{cmp}, req)
 }