diff --git a/crmLead.go b/crmLead.go
index 2ad5cde..3700390 100644
--- a/crmLead.go
+++ b/crmLead.go
@@ -219,5 +219,6 @@ func (m crmdLead) Delete() bool {
 }
 
 func (m crmdLead) avatarCacheURL() string {
-	return CRMConfig.CacheSiteURL + "?a=" + m.AvatarID
+	u := CRMConfig.CacheSiteURL + "?a=" + m.AvatarID
+	return buildSignatureAppend2Url(u, IntraAPIConfig.CRMSecrete)
 }