diff --git a/a-data-collection/exercise3.ipynb b/a-data-collection/exercise3.ipynb
index a12a963ee74846eee3678446ffa6547b053240ea..87bd2f567195d92f4dc24b73b38d2b4508c7aa2a 100644
--- a/a-data-collection/exercise3.ipynb
+++ b/a-data-collection/exercise3.ipynb
@@ -33,10 +33,10 @@
     "DATA_PATH = Path('../data/')\n",
     "\n",
     "# Epidemiology webpage : https://en.wikipedia.org/wiki/Epidemiology_of_depression\n",
-    "DEPRESSION_FILENAME = 'a1_epidemiology_of_depression.html' # Stored locally\n",
+    "DEPRESSION_FILENAME = 'epidemiology_of_depression.html' # Stored locally\n",
     "\n",
     "# Epidemiology webpage : https://en.wikipedia.org/wiki/List_of_cities_by_sunshine_duration\n",
-    "SUNSHINE_FILENAME = 'a1_city_sunshine_duration.html' # Stored locally\n",
+    "SUNSHINE_FILENAME = 'city_sunshine_duration.html' # Stored locally\n",
     "\n",
     "def read_html_file(path: Path, filename: str) -> str:\n",
     "    \"\"\"Read an HTML stored locally\"\"\"\n",
diff --git a/data/a1_city_sunshine_duration.html b/data/city_sunshine_duration.html
similarity index 100%
rename from data/a1_city_sunshine_duration.html
rename to data/city_sunshine_duration.html
diff --git a/data/a1_epidemiology_of_depression.html b/data/epidemiology_of_depression.html
similarity index 100%
rename from data/a1_epidemiology_of_depression.html
rename to data/epidemiology_of_depression.html