diff --git a/sw/deployer/src/sc64/ftdi.rs b/sw/deployer/src/sc64/ftdi.rs
index f99c728..38574de 100644
--- a/sw/deployer/src/sc64/ftdi.rs
+++ b/sw/deployer/src/sc64/ftdi.rs
@@ -486,7 +486,7 @@ impl FtdiDevice {
         wrapper.set_module_detach_mode(ModuleDetachMode::AutoDetachReattach);
         wrapper.set_interface(InterfaceIndex::A)?;
 
-        const CHUNK_SIZE: usize = 16 * 1024;
+        const CHUNK_SIZE: usize = 2 * 1024 * 1024;
 
         wrapper.read_data_set_chunksize(CHUNK_SIZE)?;
         wrapper.write_data_set_chunksize(CHUNK_SIZE)?;