diff --git a/Project.toml b/Project.toml
index d350dc39a6..4ed1b099a3 100644
--- a/Project.toml
+++ b/Project.toml
@@ -69,7 +69,7 @@ PeriodicTable = "1"
 Polynomials = "3"
 Primes = "0.5"
 ProgressMeter = "1"
-PseudoPotentialIO = "0.1"
+PseudoPotentialIO = "0.1, 0.2"
 Requires = "1"
 Roots = "2"
 SnoopPrecompile = "1"