diff --git a/saphyr/Cargo.toml b/saphyr/Cargo.toml
index 91dac70..9515208 100644
--- a/saphyr/Cargo.toml
+++ b/saphyr/Cargo.toml
@@ -10,7 +10,7 @@ repository = "https://github.com/chyh1990/yaml-rust"
 publish = false # this branch contains breaking changes
 
 [dependencies]
-linked-hash-map = ">=0.0.9, <0.5"
+linked-hash-map = ">=0.0.9, <0.6"
 
 [dev-dependencies]
 quickcheck = "0.4"