diff --git a/Cargo.toml b/Cargo.toml
index e1230cdf..3b8abb57 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -57,6 +57,6 @@ tokio = { version = "1.35" }
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 url = { version = "2.5" }
-rand = "0.8"
+rand = "0.9"
 cfg-if = "1.0"
 bytemuck = "1.21"
diff --git a/crates/aggregation/guest/tests/set-builder.rs b/crates/aggregation/guest/tests/set-builder.rs
index 5d91270e..516ad3a7 100644
--- a/crates/aggregation/guest/tests/set-builder.rs
+++ b/crates/aggregation/guest/tests/set-builder.rs
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 use guest_set_builder::{SET_BUILDER_ELF, SET_BUILDER_ID};
-use rand::{thread_rng, Rng};
+use rand::{rng, Rng};
 use risc0_aggregation::{merkle_root, GuestState};
 use risc0_zkvm::{
     default_executor, sha::Digestible, ExecutorEnv, FakeReceipt, InnerReceipt, MaybePruned,
@@ -145,7 +145,7 @@ fn proves_incremental() {
         let mut state = GuestState::initial(SET_BUILDER_ID);
         let mut set_builder_claim: Option<ReceiptClaim> = None;
         while !claims.is_empty() {
-            let chunk = claims.split_off(thread_rng().gen_range(0..claims.len()));
+            let chunk = claims.split_off(rng().random_range(0..claims.len()));
 
             let mut env_builder = ExecutorEnv::builder();
             env_builder