diff --git a/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json b/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json
index b06d35516616..4487804a13c6 100644
--- a/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json
+++ b/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json
@@ -5953,6 +5953,9 @@
           {
             "$ref": "#/parameters/SourceIfNoneMatch"
           },
+          {
+            "$ref": "#/parameters/SourceIfTags"	
+          },
           {
             "$ref": "#/parameters/IfModifiedSince"
           },
diff --git a/specification/storage/data-plane/Microsoft.BlobStorage/preview/2020-02-10/blob.json b/specification/storage/data-plane/Microsoft.BlobStorage/preview/2020-02-10/blob.json
index a3ee1d9f74a0..8fc4b99c5ba8 100644
--- a/specification/storage/data-plane/Microsoft.BlobStorage/preview/2020-02-10/blob.json
+++ b/specification/storage/data-plane/Microsoft.BlobStorage/preview/2020-02-10/blob.json
@@ -5953,6 +5953,9 @@
           {
             "$ref": "#/parameters/SourceIfNoneMatch"
           },
+          {
+            "$ref": "#/parameters/SourceIfTags"	
+          },
           {
             "$ref": "#/parameters/IfModifiedSince"
           },