diff --git a/code/API_definitions/connected-network-type.yaml b/code/API_definitions/connected-network-type.yaml
index 0bbb59bd..0a4d272f 100644
--- a/code/API_definitions/connected-network-type.yaml
+++ b/code/API_definitions/connected-network-type.yaml
@@ -173,6 +173,7 @@ components:
     ConnectedNetworkTypeResponse:
       type: object
       required:
+        - lastStatusTime
         - connectedNetworkType
       properties:
         lastStatusTime:
diff --git a/code/API_definitions/device-reachability-status.yaml b/code/API_definitions/device-reachability-status.yaml
index 24cf17d8..721e8f87 100644
--- a/code/API_definitions/device-reachability-status.yaml
+++ b/code/API_definitions/device-reachability-status.yaml
@@ -179,6 +179,7 @@ components:
     ReachabilityStatusResponse:
       type: object
       required:
+        - lastStatusTime
         - reachable
       properties:
         lastStatusTime:
diff --git a/code/API_definitions/device-roaming-status.yaml b/code/API_definitions/device-roaming-status.yaml
index 62c783a7..f833dee8 100644
--- a/code/API_definitions/device-roaming-status.yaml
+++ b/code/API_definitions/device-roaming-status.yaml
@@ -182,6 +182,7 @@ components:
     RoamingStatusResponse:
       type: object
       required:
+        - lastStatusTime
         - roaming
       properties:
         lastStatusTime: