diff --git a/extensions/series/Cargo.toml b/extensions/series/Cargo.toml
index 2fd217193..179a94ca2 100644
--- a/extensions/series/Cargo.toml
+++ b/extensions/series/Cargo.toml
@@ -18,7 +18,7 @@ crate-type = ["cdylib", "lib"]
 limbo_ext = { workspace = true, features = ["static"] }
 
 [target.'cfg(not(target_family = "wasm"))'.dependencies]
-mimalloc = { version = "*", default-features = false }
+mimalloc = { version = "0.1", default-features = false }
 
 [dev-dependencies]
 quickcheck = "1.0.3"