diff --git a/Project.toml b/Project.toml
index f1e10ea5..a71ebdc9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -19,7 +19,7 @@ StochasticDiffEq = "789caeaf-c7a9-5a7d-9973-96adeb23e2a0"
 WignerSymbols = "9f57e263-0b3d-5e2e-b1be-24f2bb48858b"
 
 [compat]
-Arpack = "0.5.1 - 0.5.3"
+Arpack = "0.5.1 - 0.5.3, 0.5"
 DiffEqCallbacks = "2"
 FFTW = "1"
 IterativeSolvers = "0.9"