diff --git a/Cargo.lock b/Cargo.lock
index 00ae8e8..e516d18 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,9 +4,9 @@ version = 4
 
 [[package]]
 name = "allocator-api2"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78200ac3468a57d333cd0ea5dd398e25111194dcacd49208afca95c629a6311d"
+checksum = "c880a97d28a3681c0267bd29cff89621202715b065127cd445fa0f0fe0aa2880"
 
 [[package]]
 name = "bit_field"
diff --git a/Cargo.toml b/Cargo.toml
index c104e96..bd41f01 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
-allocator-api2 = { version = "0.3", default-features = false, features = ["alloc"], optional = true }
+allocator-api2 = { version = "0.4", default-features = false, features = ["alloc"], optional = true }
 bitfield-struct = "0.12"
 bitflags = "2"
 endian-num = { version = "0.2", features = ["bitflags", "linux-types"] }