diff --git a/adb/fastboot.py b/adb/fastboot.py
index 1507494..b6c3631 100644
--- a/adb/fastboot.py
+++ b/adb/fastboot.py
@@ -312,7 +312,7 @@ def Download(self, source_file, source_len=0,
         """
         if isinstance(source_file, str):
             source_len = os.stat(source_file).st_size
-            source_file = open(source_file)
+            source_file = open(source_file, mode='rb')
 
         with source_file:
             if source_len == 0:
diff --git a/adb/fastboot_debug.py b/adb/fastboot_debug.py
index e168f69..2a8dc16 100755
--- a/adb/fastboot_debug.py
+++ b/adb/fastboot_debug.py
@@ -105,7 +105,7 @@ def main():
     if 'info_cb' in argspec.args:
         kwargs['info_cb'] = _InfoCb
     if 'progress_callback' in argspec.args and progressbar:
-        bar = progressbar.ProgessBar(
+        bar = progressbar.ProgressBar(
             widgets=[progressbar.Bar(), progressbar.Percentage()])
         bar.start()