diff --git a/Cargo.lock b/Cargo.lock
index 0681974..157a41c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -756,12 +756,12 @@ checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
 
 [[package]]
 name = "heapless"
-version = "0.8.0"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bfb9eb618601c89945a70e254898da93b13be0388091d42117462b265bb3fad"
+checksum = "25ba4bd83f9415b58b4ed8dc5714c76e626a105be4646c02630ad730ad3b5aa4"
 dependencies = [
  "hash32",
- "serde",
+ "serde_core",
  "stable_deref_trait",
 ]
 
diff --git a/mvstore/Cargo.toml b/mvstore/Cargo.toml
index d2a7b74..54e2143 100644
--- a/mvstore/Cargo.toml
+++ b/mvstore/Cargo.toml
@@ -43,7 +43,7 @@ zstd = "0.13"
 moka = { version = "0.12", features = ["future"] }
 bloom = "0.3.2"
 constant_time_eq = "0.4"
-heapless = { version = "0.8", features = ["serde"] }
+heapless = { version = "0.9", features = ["serde"] }
 lmdb-rkv = "0.14.0"
 bumpalo = "3.11.1"
 itertools = "0.14"