diff --git a/Project.toml b/Project.toml
index 12b4644..2eea2cc 100644
--- a/Project.toml
+++ b/Project.toml
@@ -34,7 +34,7 @@ FastGaussQuadrature = "1.0 - 1.6"
 FoldsThreads = "0.1 - 0.2"
 GSL = "1.0 - 1.2"
 IncompleteLU = "0.2 - 0.3"
-IterativeSolvers = "0.9 - 1.0"
+IterativeSolvers = "0.9"
 JLD2 = "0.4 - 0.5"
 LegendrePolynomials = "0.4 - 0.5"
 LinearMaps = "3.1 - 3.20"