diff --git a/src/main/lemondronor/advisorycircular.cljs b/src/main/lemondronor/advisorycircular.cljs
index 5e8df2f..54ddf2d 100644
--- a/src/main/lemondronor/advisorycircular.cljs
+++ b/src/main/lemondronor/advisorycircular.cljs
@@ -715,7 +715,7 @@
    ;; If the centroid of the aircraft's positions is less than this
    ;; close to an airport, then it's probably just doing flight
    ;; training.
-   :minimum-airport-distance-km 2.5
+   :minimum-airport-distance-km 3.5
    :history-db-path "advisorycircular.json"
    :aircraft-info-db-path "aircraft-info.sqb"
    :twitter {:enabled? true}})