diff --git a/fastboot/device/commands.h b/fastboot/device/commands.h
index afd6d08..9b6e7b6 100644
--- a/fastboot/device/commands.h
+++ b/fastboot/device/commands.h
@@ -19,7 +19,7 @@
 #include <string>
 #include <vector>
 
-constexpr unsigned int kMaxDownloadSizeDefault = 0x20000000;
+constexpr unsigned int kMaxDownloadSizeDefault = 0x10000000;
 
 class FastbootDevice;