diff --git a/Project.toml b/Project.toml
index cfa5486..790cae7 100644
--- a/Project.toml
+++ b/Project.toml
@@ -8,6 +8,7 @@ AbstractTrees = "1520ce14-60c1-5f80-bbc7-55ef81b5835c"
 DataAPI = "9a962f9c-6df0-11e9-0e5d-c546b8b5ee8a"
 
 [compat]
+AbstractTrees = "1.4.2"
 DataAPI = "1.6"
 julia = "1.5"