diff --git a/Project.toml b/Project.toml
index 5830802..32b79dd 100644
--- a/Project.toml
+++ b/Project.toml
@@ -8,4 +8,5 @@ IMAS = "13ead8c1-b7d1-41bb-a6d0-5b8b65ed587a"
 SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
 
 [compat]
+IMAS = "1"
 SpecialFunctions = "2"