diff --git a/release/models/system/openconfig-system.yang b/release/models/system/openconfig-system.yang
index 526b2ad45..84ac2b301 100644
--- a/release/models/system/openconfig-system.yang
+++ b/release/models/system/openconfig-system.yang
@@ -46,7 +46,13 @@ 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 "0.14.0";
+  oc-ext:openconfig-version "0.15.0";
+
+  revision "2022-07-25" {
+    description
+      "Add system software version.";
+    reference "0.15.0";
+  }
 
   revision "2022-07-20" {
     description
@@ -347,6 +353,15 @@ module openconfig-system {
           restarted.  The value is the timestamp in nanoseconds relative
           to the Unix Epoch (Jan 1, 1970 00:00:00 UTC).";
     }
+
+    leaf software-version {
+        type string;
+        description
+          "Operating system version of the currently active controller
+          of the device.  It is required that this value matches the
+          value of the state/software-version leaf in the component
+          of type OPERATING_SYSTEM.";
+    }
   }
 
   grouping mount-points-top {