diff --git a/Project.toml b/Project.toml
index 29adad95..94554bfe 100644
--- a/Project.toml
+++ b/Project.toml
@@ -46,6 +46,7 @@ Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 Weave = "44d3d7a6-8a23-5bf8-98c5-b353f8df5ec9"
 
 [compat]
+Cairo = "0.8"
 DifferentialEquations = "6.8"
 NLsolve = "4.2"
 ArbNumerics = "1.0"