diff --git a/saphyr/Cargo.toml b/saphyr/Cargo.toml
index 96cd00b..accaceb 100644
--- a/saphyr/Cargo.toml
+++ b/saphyr/Cargo.toml
@@ -13,4 +13,4 @@ preserve_order = ["linked-hash-map"]
 
 [dependencies]
 clippy = { version = "^0.*", optional = true }
-linked-hash-map = { version = "0.0.9", optional = true }
+linked-hash-map = { version = ">=0.0.9, <0.4", optional = true }