diff --git a/default b/default
index 66c1b99..7941fbf 100644
--- a/default
+++ b/default
@@ -21,7 +21,7 @@ PTRACKS=8
 
 
 # no need to change the lines below
-CHUNK_SIZE=60
+CHUNK_SIZE=20
 INT_978=1
 PF_ENABLE=1
 PF_URL="http://127.0.0.1:30053/ajax/aircraft"