diff --git a/release/models/system/openconfig-system.yang b/release/models/system/openconfig-system.yang
index 3352fd221..8534a909f 100644
--- a/release/models/system/openconfig-system.yang
+++ b/release/models/system/openconfig-system.yang
@@ -47,7 +47,13 @@ module openconfig-system {
     Section 4.c of the IETF Trust's Legal Provisions Relating
     to IETF Documents (http://trustee.ietf.org/license-info).";
 
-  oc-ext:openconfig-version "2.1.0";
+  oc-ext:openconfig-version "2.2.0";
+
+  revision "2024-08-13" {
+    description
+      "Added additional auth key types";
+    reference "2.2.0";
+  }
 
   revision "2024-07-15" {
     description
@@ -233,6 +239,42 @@ module openconfig-system {
       "MD5 encryption method";
   }
 
+  identity NTP_AUTH_SHA1 {
+    base NTP_AUTH_TYPE;
+    description
+      "SHA1 encryption method";
+  }
+
+  identity NTP_AUTH_SHA256 {
+    base NTP_AUTH_TYPE;
+    description
+      "SHA256 encryption method";
+  }
+
+  identity NTP_AUTH_SHA384 {
+    base NTP_AUTH_TYPE;
+    description
+      "SHA384 encryption method";
+  }
+
+  identity NTP_AUTH_SHA512 {
+    base NTP_AUTH_TYPE;
+    description
+      "SHA512 encryption method";
+  }
+
+  identity NTP_AUTH_AES_CBC_128 {
+    base NTP_AUTH_TYPE;
+    description
+      "AES-CBC-128 encryption method";
+  }
+
+  identity NTP_AUTH_AES_CBC_256 {
+    base NTP_AUTH_TYPE;
+    description
+      "AES-CBC-256 encryption method";
+  }
+
   // typedef statements
 
   typedef timezone-name-type {