diff --git a/Project.toml b/Project.toml
index 7385e65..d08c541 100644
--- a/Project.toml
+++ b/Project.toml
@@ -22,6 +22,9 @@ NDTools = "0.7"
 StaticArrays = "0.1, 0.3, 0.4, 0.13, 0.14, 1"
 Thunks = "0.3"
 julia = "1"
+ChainRules = "1.65, 1.66, 1.67, 1.68, 1.69"
+ChainRulesCore = "1.20, 1.21, 1.22, 1.23, 1.24"
+Zygote = "0.5, 0.6"
 
 [extras]
 IndexFunArrays = "613c443e-d742-454e-bfc6-1d7f8dd76566"