diff --git a/opencellid_parsing/002.extract_measurements.py b/opencellid_parsing/002.extract_measurements.py
index 0715439..273c635 100644
--- a/opencellid_parsing/002.extract_measurements.py
+++ b/opencellid_parsing/002.extract_measurements.py
@@ -42,7 +42,7 @@ else:
             else:
                 data[key][1] += datatmp[key][1]
 
-    pickle.dump(data, open(all_pickle_fp), 'wb')
+    pickle.dump(data, open(all_pickle_fp, 'wb'))
 
 
 print("extracting each file to disk (only groundtruth we cared)..")