diff --git a/launchdarkly-server-sdk/Cargo.toml b/launchdarkly-server-sdk/Cargo.toml
index d122a81..2282ec8 100644
--- a/launchdarkly-server-sdk/Cargo.toml
+++ b/launchdarkly-server-sdk/Cargo.toml
@@ -20,16 +20,16 @@ features = ["event-compression"]
 chrono = "0.4.19"
 crossbeam-channel = "0.5.1"
 data-encoding = "2.3.2"
-eventsource-client = { version = "0.13.0", default-features = false }
+eventsource-client = { version = "0.14.0", default-features = false }
 futures = "0.3.12"
 lazy_static = "1.4.0"
 log = "0.4.14"
-lru = { version = "0.12.0", default-features = false }
+lru = { version = "0.13.0", default-features = false }
 ring = "0.17.5"
 launchdarkly-server-sdk-evaluation = "2.0.0"
 serde = { version = "1.0.132", features = ["derive"] }
 serde_json = { version = "1.0.73", features = ["float_roundtrip"] }
-thiserror = "1.0"
+thiserror = "2.0"
 tokio = { version = "1.17.0", features = ["rt-multi-thread"] }
 parking_lot = "0.12.0"
 tokio-stream = { version = "0.1.8", features = ["sync"] }
@@ -37,7 +37,7 @@ moka = { version = "0.12.1", features = ["sync"] }
 uuid = {version = "1.2.2", features = ["v4"] }
 hyper = { version = "0.14.19", features = ["client", "http1", "http2", "tcp"] }
 hyper-rustls = { version = "0.24.1" , optional = true}
-rand = "0.8"
+rand = "0.9"
 flate2 = { version = "1.0.35", optional = true }
 
 [dev-dependencies]
diff --git a/launchdarkly-server-sdk/src/events/dispatcher.rs b/launchdarkly-server-sdk/src/events/dispatcher.rs
index 9d3ab3d..e208342 100644
--- a/launchdarkly-server-sdk/src/events/dispatcher.rs
+++ b/launchdarkly-server-sdk/src/events/dispatcher.rs
@@ -1,5 +1,5 @@
 use crossbeam_channel::{bounded, select, tick, Receiver, Sender};
-use rand::thread_rng;
+use rand::rng;
 use std::time::SystemTime;
 
 use launchdarkly_server_sdk_evaluation::Context;
@@ -89,7 +89,7 @@ impl EventDispatcher {
             last_known_time: 0,
             disabled: false,
             thread_count: 5,
-            sampler: Box::new(ThreadRngSampler::new(thread_rng())),
+            sampler: Box::new(ThreadRngSampler::new(rng())),
         }
     }
 
diff --git a/launchdarkly-server-sdk/src/migrations/migrator.rs b/launchdarkly-server-sdk/src/migrations/migrator.rs
index b4b4ff0..d7d7ca8 100644
--- a/launchdarkly-server-sdk/src/migrations/migrator.rs
+++ b/launchdarkly-server-sdk/src/migrations/migrator.rs
@@ -6,7 +6,7 @@ use futures::future::join_all;
 use futures::future::BoxFuture;
 use futures::future::FutureExt;
 use launchdarkly_server_sdk_evaluation::Context;
-use rand::thread_rng;
+use rand::rng;
 use serde::Serialize;
 
 use crate::sampler::Sampler;
@@ -219,7 +219,7 @@ where
             measure_errors,
             read_config,
             write_config,
-            sampler: Box::new(ThreadRngSampler::new(thread_rng())),
+            sampler: Box::new(ThreadRngSampler::new(rng())),
         }
     }
 
diff --git a/launchdarkly-server-sdk/src/migrations/tracker.rs b/launchdarkly-server-sdk/src/migrations/tracker.rs
index 2ff747f..547d294 100644
--- a/launchdarkly-server-sdk/src/migrations/tracker.rs
+++ b/launchdarkly-server-sdk/src/migrations/tracker.rs
@@ -4,7 +4,7 @@ use std::{
 };
 
 use launchdarkly_server_sdk_evaluation::{Context, Detail, Flag};
-use rand::thread_rng;
+use rand::rng;
 
 use crate::{
     events::event::{BaseEvent, EventFactory, MigrationOpEvent},
@@ -78,7 +78,7 @@ impl MigrationOpTracker {
     /// A callable is provided in case sampling rules do not require consistency checking to run.
     /// In this case, we can avoid the overhead of a function by not using the callable.
     pub fn consistent(&mut self, is_consistent: impl Fn() -> bool) {
-        if ThreadRngSampler::new(thread_rng()).sample(self.consistent_ratio.unwrap_or(1)) {
+        if ThreadRngSampler::new(rng()).sample(self.consistent_ratio.unwrap_or(1)) {
             self.consistent = Some(is_consistent());
         }
     }
diff --git a/launchdarkly-server-sdk/src/sampler.rs b/launchdarkly-server-sdk/src/sampler.rs
index 1fe96d5..ce30646 100644
--- a/launchdarkly-server-sdk/src/sampler.rs
+++ b/launchdarkly-server-sdk/src/sampler.rs
@@ -24,7 +24,7 @@ impl<R: Rng> Sampler for ThreadRngSampler<R> {
             return true;
         }
 
-        self.rng.gen_ratio(1, ratio)
+        self.rng.random_ratio(1, ratio)
     }
 }
 
@@ -36,13 +36,13 @@ mod tests {
 
     #[test]
     fn test_zero_is_false() {
-        let mut sampler = ThreadRngSampler::new(rand::thread_rng());
+        let mut sampler = ThreadRngSampler::new(rand::rng());
         assert!(!sampler.sample(0));
     }
 
     #[test]
     fn test_one_is_true() {
-        let mut sampler = ThreadRngSampler::new(rand::thread_rng());
+        let mut sampler = ThreadRngSampler::new(rand::rng());
         assert!(sampler.sample(1));
     }