diff --git a/exercises/practice/simple-cipher/.meta/example.rs b/exercises/practice/simple-cipher/.meta/example.rs
index fb18e9f9f..33a49501c 100644
--- a/exercises/practice/simple-cipher/.meta/example.rs
+++ b/exercises/practice/simple-cipher/.meta/example.rs
@@ -1,10 +1,10 @@
 use rand::Rng;
 
 pub fn encode_random(s: &str) -> (String, String) {
-    let mut r = rand::thread_rng();
+    let mut r = rand::rng();
     let mut key = String::new();
     for _ in 0..100 {
-        key.push(char::from(b'a' + r.gen_range(0..26)));
+        key.push(char::from(b'a' + r.random_range(0..26)));
     }
     let encoded = encode(&key, s);
     (key, encoded.unwrap())
diff --git a/exercises/practice/simple-cipher/Cargo.toml b/exercises/practice/simple-cipher/Cargo.toml
index bae81d0de..718fbe537 100644
--- a/exercises/practice/simple-cipher/Cargo.toml
+++ b/exercises/practice/simple-cipher/Cargo.toml
@@ -7,4 +7,4 @@ edition = "2024"
 # The full list of available libraries is here:
 # https://github.com/exercism/rust-test-runner/blob/main/local-registry/Cargo.toml
 [dependencies]
-rand = "0.8"
+rand = "0.9"