diff --git a/Project.toml b/Project.toml
index a0ddedb..9a193d1 100644
--- a/Project.toml
+++ b/Project.toml
@@ -15,6 +15,7 @@ StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 WignerSymbols = "9f57e263-0b3d-5e2e-b1be-24f2bb48858b"
 
 [compat]
+Caching = "0.2"
 julia = "1.7"
 
 [extras]