diff --git a/crypto/sign.py b/crypto/sign.py
index b5000cfa..b0093e9b 100755
--- a/crypto/sign.py
+++ b/crypto/sign.py
@@ -7,7 +7,7 @@ from Crypto.PublicKey import RSA
 
 rsa = RSA.importKey(open(sys.argv[3]).read())
 
-with open(sys.argv[1]) as f:
+with open(sys.argv[1], "rb") as f:
   dat = f.read()
 
 print("signing", len(dat), "bytes")
diff --git a/python/__init__.py b/python/__init__.py
index 18e57e8d..3f47ff8d 100644
--- a/python/__init__.py
+++ b/python/__init__.py
@@ -479,7 +479,7 @@ class Panda(object):
         break
       except (usb1.USBErrorIO, usb1.USBErrorOverflow):
         print("CAN: BAD RECV, RETRYING")
-	time.sleep(0.1)
+        time.sleep(0.1)
     return parse_can_buffer(dat)
 
   def can_clear(self, bus):