diff --git a/Cargo.lock b/Cargo.lock
index 8577d9b35..16ac248db 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1042,9 +1042,9 @@ dependencies = [
 
 [[package]]
 name = "heapless"
-version = "0.8.0"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bfb9eb618601c89945a70e254898da93b13be0388091d42117462b265bb3fad"
+checksum = "b1edcd5a338e64688fbdcb7531a846cfd3476a54784dcb918a0844682bc7ada5"
 dependencies = [
  "hash32",
  "stable_deref_trait",
diff --git a/Cargo.toml b/Cargo.toml
index abe2909c0..e069364ef 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -60,7 +60,7 @@ enumset-ext = { path = "./crate/enumset-ext", features = ["serde", "clap"] }
 enumset-serde = { path = "./crate/enumset-serde" }
 env_logger = "0.11"
 flate2 = "1"
-heapless = "0.8"
+heapless = "0.9"
 heapopt = { path = "./crate/heapopt" }
 hex = "0.4"
 htp = { git = "https://github.com/pamburus/htp.git" }