diff --git a/api/app/influx.py b/api/app/influx.py
index cc693a0..f7a048c 100644
--- a/api/app/influx.py
+++ b/api/app/influx.py
@@ -31,7 +31,9 @@ def write_event(event, game: str) -> bool:
         p = Point(event.type).time(event.time * 1_000_000_000)
         p.tag("game", game)
         for k, v in (event.data or {}).items():
-            if isinstance(v, (int, float, str, bool)):
+            if k.startswith("tag_"):
+                p.tag(k[4:], str(v))
+            elif isinstance(v, (int, float, str, bool)):
                 p.field(k, v)
         write_api.write(bucket=INFLUX_BUCKET, record=p)
         return True