diff --git a/Cargo.lock b/Cargo.lock
index 7338346..4b02e64 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1516,9 +1516,9 @@ dependencies = [
 
 [[package]]
 name = "stm32f4xx-hal"
-version = "0.20.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10c41454f262c0be0c35b8cfc0d971e598281f7a9be32e894dc97a0b21deadfe"
+checksum = "ceed60591531f4da636d828701c74861a3d100e5c4e36677cadbd2eb6f46eb67"
 dependencies = [
  "bare-metal 1.0.0",
  "cortex-m 0.7.7",
diff --git a/Cargo.toml b/Cargo.toml
index 3708f87..fc87bf3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -72,7 +72,7 @@ postcard = "1"
 built = { version = "0.7", features = ["git2"], default-features = false }
 
 [dependencies.stm32f4xx-hal]
-version = "0.20.0"
+version = "0.21.0"
 features = ["stm32f407", "usb_fs"]
 
 [dependencies.ad5627]