diff --git a/libraries/botbuilder-azure-blobs/src/blobsStorage.ts b/libraries/botbuilder-azure-blobs/src/blobsStorage.ts
index a2357f380c..15fb5f9551 100644
--- a/libraries/botbuilder-azure-blobs/src/blobsStorage.ts
+++ b/libraries/botbuilder-azure-blobs/src/blobsStorage.ts
@@ -165,6 +165,7 @@ export class BlobsStorage implements Storage {
 
                 return blob.upload(serialized, serialized.length, {
                     conditions: typeof eTag === 'string' && eTag !== '*' ? { ifMatch: eTag } : {},
+                    blobHTTPHeaders: { blobContentType: 'application/json' },
                 });
             },
             {