diff --git a/tools/pb2py b/tools/pb2py
index 3e2318dbb4..5188ec078c 100755
--- a/tools/pb2py
+++ b/tools/pb2py
@@ -2,10 +2,11 @@
 # Converts Google's protobuf python definitions of TREZOR wire messages
 # to plain-python objects as used in TREZOR Core and python-trezor
 
-import sys
-import importlib
-import os
 import argparse
+import importlib
+import logging
+import os
+import sys
 
 
 def import_pb2(name):
@@ -42,7 +43,7 @@ def process_message_imports(descriptor):
 
 
 def process_message(descriptor, protobuf_module, msg_id, indexfile, is_upy):
-    print("  * type %s" % descriptor.name)
+    logging.debug("Processing message %s", descriptor.name)
 
     if is_upy:
         yield "import protobuf as p"
@@ -112,7 +113,7 @@ def process_message(descriptor, protobuf_module, msg_id, indexfile, is_upy):
 
 
 def process_enum(descriptor, is_upy):
-    print("  * enum %s" % descriptor.name)
+    logging.debug("Processing enum %s", descriptor.name)
 
     if is_upy:
         yield "from micropython import const"
@@ -134,8 +135,7 @@ def process_enum(descriptor, is_upy):
 
 
 def process_file(descriptor, protobuf_module, genpath, indexfile, modlist, is_upy):
-
-    print("Processing module %s" % descriptor.name)
+    logging.info("Processing module %s", descriptor.name)
 
     msg_types = import_pb2('messages').MessageType
 
@@ -167,6 +167,8 @@ def write_to_file(genpath, t, out):
 
 
 if __name__ == '__main__':
+    logging.basicConfig(level=logging.DEBUG)
+
     parser = argparse.ArgumentParser()
     parser.add_argument('module', help="Name of module to generate")
     parser.add_argument('genpath', help="Directory for generated source code")