diff --git a/Cargo.lock b/Cargo.lock
index 7cf4d87df2..b8b734e8c2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3507,7 +3507,6 @@ dependencies = [
  "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_yaml 0.8.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "solana-clap-utils 0.21.0",
  "solana-client 0.21.0",
  "solana-config-program 0.21.0",
diff --git a/install/Cargo.toml b/install/Cargo.toml
index 19b1359183..53bc51f52c 100644
--- a/install/Cargo.toml
+++ b/install/Cargo.toml
@@ -26,7 +26,6 @@ reqwest = { version = "0.9.22", default-features = false, features = ["rustls-tl
 serde = "1.0.102"
 serde_derive = "1.0.102"
 serde_yaml = "0.8.11"
-sha2 = "0.8.0"
 solana-clap-utils = { path = "../clap-utils", version = "0.21.0" }
 solana-client = { path = "../client", version = "0.21.0" }
 solana-config-program = { path = "../programs/config", version = "0.21.0" }
diff --git a/install/src/command.rs b/install/src/command.rs
index 255e6b5038..0b36f88756 100644
--- a/install/src/command.rs
+++ b/install/src/command.rs
@@ -1,22 +1,27 @@
-use crate::config::{Config, ExplicitRelease};
-use crate::stop_process::stop_process;
-use crate::update_manifest::{SignedUpdateManifest, UpdateManifest};
+use crate::{
+    config::{Config, ExplicitRelease},
+    stop_process::stop_process,
+    update_manifest::{SignedUpdateManifest, UpdateManifest},
+};
 use chrono::{Local, TimeZone};
 use console::{style, Emoji};
 use indicatif::{ProgressBar, ProgressStyle};
-use sha2::{Digest, Sha256};
 use solana_client::rpc_client::RpcClient;
 use solana_config_program::{config_instruction, get_config_data};
-use solana_sdk::message::Message;
-use solana_sdk::pubkey::Pubkey;
-use solana_sdk::signature::{read_keypair_file, Keypair, KeypairUtil, Signable};
-use solana_sdk::transaction::Transaction;
-use std::fs::{self, File};
-use std::io::{self, BufReader, Read};
-use std::path::{Path, PathBuf};
-use std::sync::mpsc;
-use std::time::SystemTime;
-use std::time::{Duration, Instant};
+use solana_sdk::{
+    hash::{Hash, Hasher},
+    message::Message,
+    pubkey::Pubkey,
+    signature::{read_keypair_file, Keypair, KeypairUtil, Signable},
+    transaction::Transaction,
+};
+use std::{
+    fs::{self, File},
+    io::{self, BufReader, Read},
+    path::{Path, PathBuf},
+    sync::mpsc,
+    time::{Duration, Instant, SystemTime},
+};
 use tempdir::TempDir;
 use url::Url;
 
@@ -51,12 +56,12 @@ fn println_name_value(name: &str, value: &str) {
 ///
 fn download_to_temp_archive(
     url: &str,
-    expected_sha256: Option<&str>,
-) -> Result<(TempDir, PathBuf, String), Box<dyn std::error::Error>> {
-    fn sha256_file_digest<P: AsRef<Path>>(path: P) -> Result<String, Box<dyn std::error::Error>> {
+    expected_sha256: Option<&Hash>,
+) -> Result<(TempDir, PathBuf, Hash), Box<dyn std::error::Error>> {
+    fn sha256_file_digest<P: AsRef<Path>>(path: P) -> Result<Hash, Box<dyn std::error::Error>> {
         let input = File::open(path)?;
         let mut reader = BufReader::new(input);
-        let mut hasher = Sha256::new();
+        let mut hasher = Hasher::default();
 
         let mut buffer = [0; 1024];
         loop {
@@ -64,9 +69,9 @@ fn download_to_temp_archive(
             if count == 0 {
                 break;
             }
-            hasher.input(&buffer[..count]);
+            hasher.hash(&buffer[..count]);
         }
-        Ok(bs58::encode(hasher.result()).into_string())
+        Ok(hasher.result())
     }
 
     let url = Url::parse(url).map_err(|err| format!("Unable to parse {}: {}", url, err))?;
@@ -788,7 +793,7 @@ pub fn update(config_file: &str) -> Result<bool, String> {
                 return Err("Unable to update to an older version".to_string());
             }
         }
-        let release_dir = config.release_dir(&update_manifest.download_sha256);
+        let release_dir = config.release_dir(&update_manifest.download_sha256.to_string());
         let (_temp_dir, temp_archive, _temp_archive_sha256) = download_to_temp_archive(
             &update_manifest.download_url,
             Some(&update_manifest.download_sha256),
diff --git a/install/src/config.rs b/install/src/config.rs
index b7ff171964..77130b8247 100644
--- a/install/src/config.rs
+++ b/install/src/config.rs
@@ -33,7 +33,7 @@ impl Config {
             json_rpc_url: json_rpc_url.to_string(),
             update_manifest_pubkey: *update_manifest_pubkey,
             current_update_manifest: None,
-            update_poll_secs: 60, // check for updates once a minute
+            update_poll_secs: 60 * 60, // check for updates once an hour
             explicit_release,
             releases_dir: PathBuf::from(data_dir).join("releases"),
             active_release_dir: PathBuf::from(data_dir).join("active_release"),
diff --git a/install/src/update_manifest.rs b/install/src/update_manifest.rs
index ec834e16f0..b3571019b2 100644
--- a/install/src/update_manifest.rs
+++ b/install/src/update_manifest.rs
@@ -1,17 +1,18 @@
 use serde_derive::{Deserialize, Serialize};
 use solana_config_program::ConfigState;
-use solana_sdk::pubkey::Pubkey;
-use solana_sdk::signature::{Signable, Signature};
-use std::borrow::Cow;
-use std::error;
-use std::io;
+use solana_sdk::{
+    hash::Hash,
+    pubkey::Pubkey,
+    signature::{Signable, Signature},
+};
+use std::{borrow::Cow, error, io};
 
 /// Information required to download and apply a given update
 #[derive(Serialize, Deserialize, Default, Debug, PartialEq)]
 pub struct UpdateManifest {
     pub timestamp_secs: u64, // When the release was deployed in seconds since UNIX EPOCH
     pub download_url: String, // Download URL to the release tar.bz2
-    pub download_sha256: String, // SHA256 digest of the release tar.bz2 file
+    pub download_sha256: Hash, // SHA256 digest of the release tar.bz2 file
 }
 
 /// Userdata of an Update Manifest program Account.