diff --git a/specification/applicationinsights/data-plane/Microsoft.Insights/preview/2018-04-20/swagger.json b/specification/applicationinsights/data-plane/Microsoft.Insights/preview/2018-04-20/swagger.json
index 05a0090a8034..8588ec8aeff2 100644
--- a/specification/applicationinsights/data-plane/Microsoft.Insights/preview/2018-04-20/swagger.json
+++ b/specification/applicationinsights/data-plane/Microsoft.Insights/preview/2018-04-20/swagger.json
@@ -1141,6 +1141,9 @@
             "additionalProperties": {
               "type": "object"
             }
+          },
+          "additionalProperties": {
+            "type": "object"
           }
         },
         "customMeasurements": {
@@ -1150,6 +1153,9 @@
             "additionalProperties": {
               "type": "object"
             }
+          },
+          "additionalProperties": {
+            "type": "object"
           }
         },
         "operation": {
diff --git a/specification/applicationinsights/data-plane/Microsoft.Insights/preview/v1/AppInsights.json b/specification/applicationinsights/data-plane/Microsoft.Insights/preview/v1/AppInsights.json
index e53ba9f6fe61..8394b928bd9e 100644
--- a/specification/applicationinsights/data-plane/Microsoft.Insights/preview/v1/AppInsights.json
+++ b/specification/applicationinsights/data-plane/Microsoft.Insights/preview/v1/AppInsights.json
@@ -1078,6 +1078,9 @@
             "additionalProperties": {
               "type": "object"
             }
+          },
+          "additionalProperties": {
+            "type": "object"
           }
         },
         "customMeasurements": {
@@ -1087,6 +1090,9 @@
             "additionalProperties": {
               "type": "object"
             }
+          },
+          "additionalProperties": {
+            "type": "object"
           }
         },
         "operation": {