diff --git a/Project.toml b/Project.toml
index 84fb432..a155e4b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -11,7 +11,7 @@ PyCall = "438e738f-606a-5dbb-bf0a-cddfbfd45ab0"
 REPL = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
 [compat]
-Compat = "2.0, 3.0"
+Compat = "2.0, 3.0, 4.0"
 Conda = "1.0"
 PyCall = "1.16"
 julia = "1.0"