diff --git a/README.md b/README.md
index 76699f3..2fc4490 100644
Binary files a/README.md and b/README.md differ
diff --git a/dejavu/recognize.py b/dejavu/recognize.py
index ec9e824..dfc06d9 100755
--- a/dejavu/recognize.py
+++ b/dejavu/recognize.py
@@ -99,7 +99,7 @@ class MicrophoneRecognizer(BaseRecognizer):
     def get_recorded_time(self):
         return len(self.data[0]) / self.rate
 
-    def recognize(self, seconds=None):
+    def recognize(self, seconds=10):
         self.start_recording()
         for i in range(0, int(self.samplerate / self.chunksize
                               * seconds)):