diff --git a/Project.toml b/Project.toml
index 2db855c..7c8f432 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,7 +21,7 @@ AlgebraicRewritingLuxorExt = "Luxor"
 
 [compat]
 ACSets = "0.2.9"
-Catlab = "0.15.4"
+Catlab = "0.15.4, 0.16"
 DataStructures = "0.17, 0.18"
 Reexport = "^1"
 StructEquality = "2.1"