diff --git a/lib/common/defaults.js b/lib/common/defaults.js
index 8dded64..4e21868 100644
--- a/lib/common/defaults.js
+++ b/lib/common/defaults.js
@@ -23,7 +23,7 @@ Defaults.BACKOFF_TIME = 2;
 Defaults.MAX_MAIN_ADDRESS_GAP = 20;
 
 // TODO: should allow different gap sizes for external/internal chains
-Defaults.SCAN_ADDRESS_GAP = Defaults.MAX_MAIN_ADDRESS_GAP;
+Defaults.SCAN_ADDRESS_GAP = Defaults.MAX_MAIN_ADDRESS_GAP + 20;
 
 Defaults.FEE_LEVELS = [{
   name: 'priority',