diff --git a/Cargo.lock b/Cargo.lock
index 1f0deb8..73e09c1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -572,7 +572,7 @@ dependencies = [
  "pyo3",
  "pyo3-log",
  "rand 0.8.5",
- "rand_chacha 0.3.1",
+ "rand_chacha 0.10.0",
  "rayon",
  "riichi-tools-rs",
  "serde",
@@ -831,6 +831,16 @@ dependencies = [
  "rand_core 0.6.4",
 ]
 
+[[package]]
+name = "rand_chacha"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3e6af7f3e25ded52c41df4e0b1af2d047e45896c2f3281792ed68a1c243daedb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.10.1",
+]
+
 [[package]]
 name = "rand_core"
 version = "0.5.1"
@@ -849,6 +859,12 @@ dependencies = [
  "getrandom 0.2.15",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
+
 [[package]]
 name = "rand_hc"
 version = "0.2.0"
diff --git a/Cargo.toml b/Cargo.toml
index 79ae759..2bc000c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ ndarray = "0.15"
 numpy = "0.21"
 serde_with = "3"
 rand = "0.8"
-rand_chacha = "0.3"
+rand_chacha = "0.10"
 flate2 = "1"
 sha3 = "0.10"
 glob = "0.3"