diff --git a/Cargo.toml b/Cargo.toml
index d7e0227..5acadc8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -34,7 +34,7 @@ nalgebra = { version = ">=0.21, <0.28", optional = true }
 serde =  { version = "1", features = ["derive"], optional = true }
 
 [dev-dependencies]
-float-cmp = ">=0.6, < 0.9"
+float-cmp = ">=0.6, < 0.10"
 serde_json = "1"
 
 [package.metadata.docs.rs]