diff --git a/Project.toml b/Project.toml
index 3d121ea..7a0292c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -25,6 +25,7 @@ Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 [compat]
 AbstractCosmologicalEmulators = "0.6"
 DataInterpolations = "6, 6.6"
+FindFirstFunctions = "1"
 Tullio = "0.3"
 NPZ = "0.4"
 OrdinaryDiffEqTsit5 = "1"