diff --git a/Cargo.toml b/Cargo.toml
index dd02c3b..d013fef 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -34,7 +34,7 @@ nalgebra = { version = ">=0.21, <0.25", optional = true }
 num-traits = { version = "0.2", optional = true }
 serde =  { version = "1", optional = true }
 serde_derive = { version = "1", optional = true }
-simba = { version = ">=0.1.2, <0.4", optional = true }
+simba = { version = ">=0.1.2, <0.5", optional = true }
 
 [dev-dependencies]
 float-cmp = ">=0.6, < 0.9"