diff --git a/Cargo.lock b/Cargo.lock
index 80d93e5..5840a8e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -461,7 +461,7 @@ dependencies = [
  "hmac",
  "password-hash",
  "proptest",
- "rand 0.8.6",
+ "rand 0.10.1",
  "scrypt",
  "sha1",
  "sha2",
@@ -2088,7 +2088,7 @@ dependencies = [
  "bitflags",
  "num-traits",
  "rand 0.9.4",
- "rand_chacha 0.9.0",
+ "rand_chacha",
  "rand_xorshift",
  "regex-syntax",
  "rusty-fork",
@@ -2170,24 +2170,13 @@ version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
-[[package]]
-name = "rand"
-version = "0.8.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ca0ecfa931c29007047d1bc58e623ab12e5590e8c7cc53200d5202b69266d8a"
-dependencies = [
- "libc",
- "rand_chacha 0.3.1",
- "rand_core 0.6.4",
-]
-
 [[package]]
 name = "rand"
 version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44c5af06bb1b7d3216d91932aed5265164bf384dc89cd6ba05cf59a35f5f76ea"
 dependencies = [
- "rand_chacha 0.9.0",
+ "rand_chacha",
  "rand_core 0.9.5",
 ]
 
@@ -2202,16 +2191,6 @@ dependencies = [
  "rand_core 0.10.1",
 ]
 
-[[package]]
-name = "rand_chacha"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
-dependencies = [
- "ppv-lite86",
- "rand_core 0.6.4",
-]
-
 [[package]]
 name = "rand_chacha"
 version = "0.9.0"
diff --git a/crates/bymax-auth-crypto/Cargo.toml b/crates/bymax-auth-crypto/Cargo.toml
index 5da2ec9..95acd14 100644
--- a/crates/bymax-auth-crypto/Cargo.toml
+++ b/crates/bymax-auth-crypto/Cargo.toml
@@ -21,7 +21,7 @@ description = "Cryptographic primitives for bymax-auth: password hashing, consta
 hmac = "0.12"
 sha2 = "0.10"
 subtle = "2.6"
-rand = "0.8"
+rand = "0.10"
 # `getrandom` is pinned to the major that `rand_core 0.6` (pulled by `password-hash
 # 0.5` for salt generation) depends on, so the production (non-dev) graph carries a
 # single `getrandom`. (Dev-only `proptest` pulls a newer `rand`/`getrandom`; those are