diff --git a/Cargo.lock b/Cargo.lock
index 343d1e5..4a33c6a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -510,8 +510,8 @@ dependencies = [
  "flate2",
  "git-version",
  "log",
- "rand",
- "rand_chacha",
+ "rand 0.9.3",
+ "rand_chacha 0.3.1",
  "siphasher",
  "thread-priority",
  "wide",
@@ -542,8 +542,8 @@ version = "0.0.0"
 dependencies = [
  "criterion",
  "lepton_jpeg",
- "rand",
- "rand_chacha",
+ "rand 0.9.3",
+ "rand_chacha 0.3.1",
  "rstest",
  "siphasher",
 ]
@@ -812,8 +812,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
  "libc",
- "rand_chacha",
- "rand_core",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ec095654a25171c2124e9e3393a930bddbffdc939556c914957a4c3e0a87166"
+dependencies = [
+ "rand_chacha 0.9.0",
+ "rand_core 0.9.5",
 ]
 
 [[package]]
@@ -823,7 +833,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.9.5",
 ]
 
 [[package]]
@@ -835,6 +855,15 @@ dependencies = [
  "getrandom 0.2.16",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
+dependencies = [
+ "getrandom 0.3.4",
+]
+
 [[package]]
 name = "rayon"
 version = "1.11.0"
@@ -1478,7 +1507,7 @@ checksum = "1ccf671d62d1bd0c913d9059e69bb4a6b51f7a4c899ab83c62d921e35f206053"
 dependencies = [
  "defer-heavy",
  "log",
- "rand",
+ "rand 0.8.5",
  "sync-ptr",
  "windows",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 1e6fd60..1634ef4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ members = ["lib", "dll", "util", "python"]
 [dev-dependencies]
 lepton_jpeg = { path = "lib", features = ["micro_benchmark"] }
 rstest = "0.22"
-rand = "0.8"
+rand = "0.9"
 rand_chacha = "0.3"
 siphasher = "1"
 criterion = "0.7"
diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index 8d9cb2a..4f2c4e8 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -40,7 +40,7 @@ thread-priority = "1.0"
 thread-priority = "1.0"
 
 [dev-dependencies]
-rand = "0.8"
+rand = "0.9"
 rand_chacha = "0.3"
 siphasher = "1"