diff --git a/firmware/Cargo.lock b/firmware/Cargo.lock
index 6f2caec..4b7d9e7 100644
--- a/firmware/Cargo.lock
+++ b/firmware/Cargo.lock
@@ -1712,7 +1712,7 @@ dependencies = [
  "ed25519-dalek",
  "embedded-storage",
  "hmac",
- "rand_core 0.9.5",
+ "rand_core 0.10.1",
  "sha1",
  "sha2 0.11.0",
  "subtle",
diff --git a/firmware/core/Cargo.toml b/firmware/core/Cargo.toml
index 1392f69..3e1058b 100644
--- a/firmware/core/Cargo.toml
+++ b/firmware/core/Cargo.toml
@@ -15,7 +15,7 @@ workspace = true
 [dependencies]
 # Hardware comes in through traits: flash, entropy, time, the port, the button and LED.
 embedded-storage = "0.3"
-rand_core = "0.9"
+rand_core = "0.10"
 
 # Crypto: pure Rust, no_std, from RustCrypto. No hand-rolled primitives. The zeroize
 # features make the crates scrub their expanded keys and HMAC pads when dropped.