diff --git a/bytestring/Cargo.toml b/bytestring/Cargo.toml
index 3dbf07b7..ba14f7be 100644
--- a/bytestring/Cargo.toml
+++ b/bytestring/Cargo.toml
@@ -24,4 +24,4 @@ serde = { version = "1.0", optional = true }
 
 [dev-dependencies]
 serde_json = "1.0"
-ahash = { version = "0.7", default-features = false }
+ahash = { version = "=0.7.4", default-features = false }