diff --git a/saphyr/Cargo.toml b/saphyr/Cargo.toml
index ec52263..9444efa 100644
--- a/saphyr/Cargo.toml
+++ b/saphyr/Cargo.toml
@@ -11,7 +11,7 @@ readme = "README.md"
 edition = "2018"
 
 [dependencies]
-linked-hash-map = ">=0.0.9, <0.6"
+linked-hash-map = "0.5.3"
 
 [dev-dependencies]
 quickcheck = "0.9"