diff --git a/Project.toml b/Project.toml
index d41406a..71cc676 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,7 +21,7 @@ AbInitioSoftwareBase = "0.6.1, 0.8, 0.9"
 Configurations = "0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17"
 Crystallography = "0.2, 0.3, 0.4, 0.5"
 EquationsOfStateOfSolids = "0.4"
-Express = "0.5, 0.6, 0.7, 0.8"
+Express = "0.5, 0.6, 0.7, 0.8, 0.9"
 QuantumESPRESSO = "0.7, 0.8"
 Setfield = "0.4, 0.5, 0.6, 0.7, 0.8, 1"
 UnifiedPseudopotentialFormat = "0.3, 0.4"