diff --git a/src/config.py b/src/config.py
index 8c42f26..5b1f309 100644
--- a/src/config.py
+++ b/src/config.py
@@ -7,6 +7,8 @@
 class Config:
     event = "europython-2025"
     event_dir_name = "ep2025"
+    api_version = "v1"
+
     project_root = Path(__file__).resolve().parents[1]
     raw_path = Path(f"{project_root}/data/raw/{event_dir_name}")
     public_path = Path(f"{project_root}/data/public/{event_dir_name}")
diff --git a/src/download.py b/src/download.py
index 68f816f..847f751 100644
--- a/src/download.py
+++ b/src/download.py
@@ -21,6 +21,7 @@
 headers = {
     "Accept": "application/json, text/javascript",
     "Authorization": f"Token {Config.token()}",
+    "Pretalx-Version": Config.api_version,
 }
 
 base_url = f"https://pretalx.com/api/events/{Config.event}/"