diff --git a/Project.toml b/Project.toml
index 1faf7f6..8159de6 100644
--- a/Project.toml
+++ b/Project.toml
@@ -14,7 +14,7 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
 julia = "1.3.1"
-Compat = "3.16"
+Compat = "3.16, 4"
 Configurations = "0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17"
 AbInitioSoftwareBase = "0.4, 0.5, 0.6"
 Comonicon = "0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.10, 0.11, 0.12, 1"