diff --git a/Cargo.toml b/Cargo.toml
index c65111d3..a2e71782 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,22 +25,22 @@ appveyor = { repository = "aerospike/aerospike-client-rust" }
 [dependencies]
 log = "0.4"
 byteorder = "1.3"
-ripemd160 = "0.8"
-base64 = "0.11"
-crossbeam-queue = "0.2"
-rand = "0.7"
+ripemd160 = "0.9"
+base64 = "0.13"
+crossbeam-queue = "0.3"
+rand = "0.8"
 scoped-pool = "1.0"
 lazy_static = "1.4"
 error-chain = "0.12"
-parking_lot = "0.9"
-pwhash = "0.3"
+parking_lot = "0.11"
+pwhash = "1.0"
 serde = { version = "1.0", features = ["derive"], optional = true }
 
 [features]
 serialization = ["serde"]
 
 [dev-dependencies]
-env_logger = "0.7"
+env_logger = "0.9"
 hex = "0.4"
 bencher = "0.1"
 serde_json = "1.0"
diff --git a/src/key.rs b/src/key.rs
index 834de227..f5c333cb 100644
--- a/src/key.rs
+++ b/src/key.rs
@@ -66,14 +66,14 @@ impl Key {
 
     fn compute_digest(&mut self) -> Result<()> {
         let mut hash = Ripemd160::new();
-        hash.input(self.set_name.as_bytes());
+        hash.update(self.set_name.as_bytes());
         if let Some(ref user_key) = self.user_key {
-            hash.input(&[user_key.particle_type() as u8]);
+            hash.update(&[user_key.particle_type() as u8]);
             user_key.write_key_bytes(&mut hash)?;
         } else {
             unreachable!()
         }
-        self.digest = hash.result().into();
+        self.digest = hash.finalize().into();
 
         Ok(())
     }
diff --git a/src/query/recordset.rs b/src/query/recordset.rs
index 02f348af..a6ec3b87 100644
--- a/src/query/recordset.rs
+++ b/src/query/recordset.rs
@@ -94,7 +94,7 @@ impl<'a> Iterator for &'a Recordset {
     fn next(&mut self) -> Option<Result<Record>> {
         loop {
             if self.is_active() || !self.record_queue.is_empty() {
-                let result = self.record_queue.pop().ok();
+                let result = self.record_queue.pop();
                 if result.is_some() {
                     self.record_queue_count.fetch_sub(1, Ordering::Relaxed);
                     return result;
diff --git a/src/value.rs b/src/value.rs
index 2f93ea00..8a5bd78e 100644
--- a/src/value.rs
+++ b/src/value.rs
@@ -309,15 +309,15 @@ impl Value {
             Value::Int(ref val) => {
                 let mut buf = [0; 8];
                 NetworkEndian::write_i64(&mut buf, *val);
-                h.input(&buf);
+                h.update(&buf);
                 Ok(())
             }
             Value::String(ref val) => {
-                h.input(val.as_bytes());
+                h.update(val.as_bytes());
                 Ok(())
             }
             Value::Blob(ref val) => {
-                h.input(val);
+                h.update(val);
                 Ok(())
             }
             _ => panic!("Data type is not supported as Key value."),
diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index 99a60829..4905973f 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -61,5 +61,8 @@ pub fn client() -> Arc<Client> {
 
 pub fn rand_str(sz: usize) -> String {
     let rng = rand::thread_rng();
-    rng.sample_iter(&Alphanumeric).take(sz).collect()
+    rng.sample_iter(&Alphanumeric)
+        .map(char::from)
+        .take(sz)
+        .collect()
 }