diff --git a/Project.toml b/Project.toml
index ef37d3b..8de0783 100644
--- a/Project.toml
+++ b/Project.toml
@@ -23,7 +23,7 @@ ITensorMPS = "0.2.2"
 ITensors = "0.6.8"
 Infinities = "0.1"
 IterTools = "1"
-KrylovKit = "0.5, 0.6, 0.7"
+KrylovKit = "0.5, 0.6, 0.7, 0.8"
 OffsetArrays = "1"
 QuadGK = "2"
 SplitApplyCombine = "1.2.2"