diff --git a/hw02/import.py b/hw02/import.py
index 3122b06..dea1a0d 100644
--- a/hw02/import.py
+++ b/hw02/import.py
@@ -177,10 +177,10 @@ def json_to_paper(filename: str, jsonObj: dict) -> dict:
     i = 0
     references = []
     for key, value in getProp(jsonObj, "bib_entries", {}).items():
-        i += 1
         if value is None:
             continue
 
+        i += 1
         ref = {
             "referenceNumber": i,
             "doi": getProp(value, "doi"),