diff --git a/Project.toml b/Project.toml
index 58ad5d2b..a64ce846 100644
--- a/Project.toml
+++ b/Project.toml
@@ -26,6 +26,7 @@ EquationsOfStateOfSolids = "0.2, 0.3, 0.4"
 ExpressBase = "0.7"
 PyQHA = "0.1"
 SimpleWorkflows = "0.29"
+Spglib = "0.8"
 Thinkers = "0.1, 0.2, 0.3, 0.4"
 Unitful = "0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 1"
 UnitfulParsableString = "0.1"