diff --git a/Cargo.toml b/Cargo.toml
index 45466440..33f758d4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_cbor = "0.11"
 serde_json = "1.0"
 simplelog = "0.8"
-tokio = { version = "0.3", features = ["fs", "io-util", "macros", "rt", "sync", "time"] }
+tokio = { version = "0.3", features = ["fs", "io-util", "macros", "rt-multi-thread", "sync", "time"] }
 url = "2.1"
 
 # optional dependencies
diff --git a/src/lib.rs b/src/lib.rs
index 451c9b24..c7f791b4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -433,6 +433,7 @@ use std::{f32, fmt, io, time};
 use tokio::fs::File;
 use tokio::io::BufWriter;
 use tokio::prelude::*;
+use tokio::runtime::Runtime;
 use tokio::sync::mpsc;
 use url::Url;
 
@@ -2019,7 +2020,7 @@ impl GooseAttack {
         if self.attack_mode == GooseMode::Manager {
             #[cfg(feature = "gaggle")]
             {
-                let mut rt = tokio::runtime::Runtime::new().unwrap();
+                let rt = Runtime::new().unwrap();
                 self = rt.block_on(manager::manager_main(self));
             }
 
@@ -2034,7 +2035,7 @@ impl GooseAttack {
         else if self.attack_mode == GooseMode::Worker {
             #[cfg(feature = "gaggle")]
             {
-                let mut rt = tokio::runtime::Runtime::new().unwrap();
+                let rt = Runtime::new().unwrap();
                 self = rt.block_on(worker::worker_main(&self));
             }
 
@@ -2048,7 +2049,7 @@ impl GooseAttack {
         }
         // Start goose in single-process mode.
         else {
-            let mut rt = tokio::runtime::Runtime::new().unwrap();
+            let rt = Runtime::new().unwrap();
             self = rt.block_on(self.launch_users(sleep_duration, None))?;
         }
 
@@ -2164,7 +2165,7 @@ impl GooseAttack {
             throttle_rx,
         )));
 
-        let mut sender = all_threads_throttle.clone();
+        let sender = all_threads_throttle.clone();
         // We start from 1 instead of 0 to intentionally fill all but one slot in the
         // channel to avoid a burst of traffic during startup. The channel then provides
         // an implementation of the leaky bucket algorithm as a queue. Requests have to
@@ -2501,7 +2502,7 @@ impl GooseAttack {
                 }
 
                 // If throttle is enabled, tell throttle thread the load test is over.
-                if let Some(mut tx) = parent_to_throttle_tx {
+                if let Some(tx) = parent_to_throttle_tx {
                     let _ = tx.send(false).await;
                 }
 
@@ -2552,7 +2553,7 @@ impl GooseAttack {
             }
 
             let one_second = time::Duration::from_secs(1);
-            tokio::time::delay_for(one_second).await;
+            tokio::time::sleep(one_second).await;
         }
         self.metrics.duration = self.started.unwrap().elapsed().as_secs() as usize;
 
diff --git a/src/user.rs b/src/user.rs
index 44c43429..798a36b4 100644
--- a/src/user.rs
+++ b/src/user.rs
@@ -132,7 +132,7 @@ pub async fn user_main(
                     "user {} from {} sleeping {:?} second...",
                     thread_number, thread_task_set.name, sleep_duration
                 );
-                tokio::time::delay_for(sleep_duration).await;
+                tokio::time::sleep(sleep_duration).await;
                 slept += 1;
                 if slept > wait_time {
                     in_sleep_loop = false;
diff --git a/src/util.rs b/src/util.rs
index 2d95f180..612fdf70 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -52,7 +52,7 @@ pub async fn sleep_minus_drift(
     drift: tokio::time::Instant,
 ) -> tokio::time::Instant {
     match duration.checked_sub(drift.elapsed()) {
-        Some(delay) if delay.as_nanos() > 0 => tokio::time::delay_for(delay).await,
+        Some(delay) if delay.as_nanos() > 0 => tokio::time::sleep(delay).await,
         _ => warn!("sleep_minus_drift: drift was greater than or equal to duration, not sleeping"),
     };
     tokio::time::Instant::now()
diff --git a/tests/sequence.rs b/tests/sequence.rs
index 66ea46e9..46005ed6 100644
--- a/tests/sequence.rs
+++ b/tests/sequence.rs
@@ -1,7 +1,7 @@
 use httpmock::Method::GET;
 use httpmock::{Mock, MockRef, MockServer};
 use serial_test::serial;
-use tokio::time::{delay_for, Duration};
+use tokio::time::{sleep, Duration};
 
 mod common;
 
@@ -50,7 +50,7 @@ pub async fn two_with_delay(user: &GooseUser) -> GooseTaskResult {
     // "Run out the clock" on the load test when this function runs. Sleep for
     // the total duration the test is to run plus 1 second to be sure no
     // additional tasks will run after this one.
-    delay_for(Duration::from_secs(RUN_TIME as u64 + 1)).await;
+    sleep(Duration::from_secs(RUN_TIME as u64 + 1)).await;
 
     Ok(())
 }