diff --git a/sdk/rust/Cargo.toml b/sdk/rust/Cargo.toml
index 5d765ce..7236edb 100644
--- a/sdk/rust/Cargo.toml
+++ b/sdk/rust/Cargo.toml
@@ -15,4 +15,4 @@ serde_json = "1"
 base64 = "0.22"           # 0.5.1 — wallet_hook(privy) needs Basic auth encoding
 urlencoding = "2"         # 0.5.1 — wallet_hook(privy) URL-encodes the wallet_id path segment
 p256 = { version = "0.13", features = ["pkcs8", "ecdsa"] }   # 0.6.2 — CDP-JWT (ES256) signing
-rand_core = "0.6"         # 0.6.2 — nonce randomness for CDP-JWT
+rand_core = "0.10"         # 0.6.2 — nonce randomness for CDP-JWT