diff --git a/Project.toml b/Project.toml
index 2505dc8..f63cfc6 100644
--- a/Project.toml
+++ b/Project.toml
@@ -23,7 +23,7 @@ TimerOutputs = "a759f4b9-e2f1-59dc-863e-4aeb61b1ea8f"
 [compat]
 CodecBzip2 = "0.7.2"
 CodecZlib = "0.7.0"
-Krylov = "0.8"
+Krylov = "0.8, 0.9"
 LDLFactorizations = "0.8, 0.9, 0.10"
 LinearOperators = "2.0"
 MathOptInterface = "1"
diff --git a/test/Project.toml b/test/Project.toml
index 4fdbc50..ad12cc2 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -7,5 +7,5 @@ TOML = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
-Krylov = "0.8"
+Krylov = "0.8, 0.9"
 MathOptInterface= "1"