diff --git a/src/BtConstants.h b/src/BtConstants.h
index c4661765..fcc4acf7 100644
--- a/src/BtConstants.h
+++ b/src/BtConstants.h
@@ -56,7 +56,7 @@ typedef std::map<std::string, uint8_t> Extensions;
 #define OUTSTANDING_REQUEST_STEP 6
 
 // Upper Bound of the number of outstanding request
-#define UB_MAX_OUTSTANDING_REQUEST 100
+#define UB_MAX_OUTSTANDING_REQUEST 200
 
 #define METADATA_PIECE_SIZE (16*1024)