diff --git a/personal_data/fetchers/wanikani_lessons.py b/personal_data/fetchers/wanikani_lessons.py
index 90dae07..49927d7 100644
--- a/personal_data/fetchers/wanikani_lessons.py
+++ b/personal_data/fetchers/wanikani_lessons.py
@@ -27,13 +27,13 @@ class WaniKaniLessonsFetcher(Scraper):
             json_resp = response.json()
             for assignment in json_resp.get('data', []):
                 data_item = assignment['data']
-                subject_id = data_item.get("subject_id")
+                subject_id = data_item.get('subject_id')
                 if subject_id:
                     subj_url = f'https://api.wanikani.com/v2/subjects/{subject_id}'
                     subj_response = self.session.get(subj_url, headers=headers)
                     subj_response.raise_for_status()
                     subj_json = subj_response.json()
-                    subject_characters = subj_json.get("data", {}).get("characters")
-                    data_item["subject_characters"] = subject_characters
+                    subject_characters = subj_json.get('data', {}).get('characters')
+                    data_item['subject_characters'] = subject_characters
                 yield data_item
             url = json_resp.get('pages', {}).get('next_url')