diff --git a/Project.toml b/Project.toml
index 02b13bdf91..c665a7708e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -52,7 +52,7 @@ Dictionaries = "0.4"
 DocStringExtensions = "0.9.3"
 Functors = "0.2, 0.3, 0.4"
 HDF5 = "0.14, 0.15, 0.16, 0.17"
-IsApprox = "0.1"
+IsApprox = "0.1, 1"
 KrylovKit = "0.4.2, 0.5, 0.6, 0.7, 0.8"
 LinearAlgebra = "1.6"
 LinearMaps = "3"