diff --git a/Cargo.lock b/Cargo.lock
index f737a2d..872ed9b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
 name = "ahash"
-version = "0.8.8"
+version = "0.8.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42cd52102d3df161c77a887b608d7a4897d7cc112886a9537b738a887a03aaff"
+checksum = "e89da841a80418a9b391ebaea17f5c112ffaaa96f621d2c285b5174da76b9011"
 dependencies = [
  "cfg-if",
  "getrandom",
diff --git a/calculate/Cargo.toml b/calculate/Cargo.toml
index 1989c15..af8ead3 100644
--- a/calculate/Cargo.toml
+++ b/calculate/Cargo.toml
@@ -8,7 +8,7 @@ edition = "2021"
 [dependencies]
 clap = { version = "4.5.2", features = ["derive"] }
 # This is the latest version that actually uses AES on arm64
-ahash = "=0.8.8"
+ahash = "0.8.11"
 bumpalo-herd = "0.1.2"
 anyhow = "1.0.80"
 indicatif = "0.17.8"
diff --git a/calculate/src/optimized.rs b/calculate/src/optimized.rs
index b5bbfc2..1976434 100644
--- a/calculate/src/optimized.rs
+++ b/calculate/src/optimized.rs
@@ -14,6 +14,8 @@ use {
     },
 };
 
+type HashBuilder = RandomState;
+
 #[derive(Debug)]
 struct Data {
     min: i64,
@@ -65,8 +67,8 @@ pub(crate) fn run(args: Args) -> Result<()> {
             results.push(s.spawn(move || chunk(input, pb, city_bumper)));
             start = end;
         }
-        let mut data: HashMap<&[u8], Data, RandomState> =
-            HashMap::with_capacity_and_hasher(UNIQUE_CITY_COUNT, RandomState::default());
+        let mut data: HashMap<&[u8], Data, HashBuilder> =
+            HashMap::with_capacity_and_hasher(UNIQUE_CITY_COUNT, HashBuilder::default());
         for res in results {
             let chunk_data = res.join().unwrap()?;
             for (
@@ -155,9 +157,9 @@ fn chunk<'input, 'bump>(
     mut input: &'input [u8],
     pb: ProgressBar,
     city_bumper: Member<'bump>,
-) -> Result<HashMap<&'bump [u8], Data, RandomState>> {
-    let mut data: HashMap<&'bump [u8], Data, RandomState> =
-        HashMap::with_capacity_and_hasher(UNIQUE_CITY_COUNT, RandomState::default());
+) -> Result<HashMap<&'bump [u8], Data, HashBuilder>> {
+    let mut data: HashMap<&'bump [u8], Data, HashBuilder> =
+        HashMap::with_capacity_and_hasher(UNIQUE_CITY_COUNT, HashBuilder::default());
 
     let sep = Chunk::splat(b';');
     let nl = Chunk::splat(b'\n');
diff --git a/flake.lock b/flake.lock
index 636404b..8cabc3f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -10,11 +10,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1711099426,
-        "narHash": "sha256-HzpgM/wc3aqpnHJJ2oDqPBkNsqWbW0WfWUO8lKu8nGk=",
+        "lastModified": 1717408969,
+        "narHash": "sha256-Q0OEFqe35fZbbRPPRdrjTUUChKVhhWXz3T9ZSKmaoVY=",
         "owner": "numtide",
         "repo": "devshell",
-        "rev": "2d45b54ca4a183f2fdcf4b19c895b64fbf620ee8",
+        "rev": "1ebbe68d57457c8cae98145410b164b5477761f4",
         "type": "github"
       },
       "original": {
@@ -31,11 +31,11 @@
         "rust-analyzer-src": "rust-analyzer-src"
       },
       "locked": {
-        "lastModified": 1712211755,
-        "narHash": "sha256-KIJA4OvXFDXEeu7wstFDCxqZEfjaPQIowpzNww48TUw=",
+        "lastModified": 1717827974,
+        "narHash": "sha256-ixopuTeTouxqTxfMuzs6IaRttbT8JqRW5C9Q/57WxQw=",
         "owner": "nix-community",
         "repo": "fenix",
-        "rev": "39763c6e23a8423af316b85a74bad0cc5bc88d86",
+        "rev": "ab655c627777ab5f9964652fe23bbb1dfbd687a8",
         "type": "github"
       },
       "original": {
@@ -66,11 +66,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1712163089,
-        "narHash": "sha256-Um+8kTIrC19vD4/lUCN9/cU9kcOsD1O1m+axJqQPyMM=",
+        "lastModified": 1718160348,
+        "narHash": "sha256-9YrUjdztqi4Gz8n3mBuqvCkMo4ojrA6nASwyIKWMpus=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "fd281bd6b7d3e32ddfa399853946f782553163b5",
+        "rev": "57d6973abba7ea108bac64ae7629e7431e0199b6",
         "type": "github"
       },
       "original": {
@@ -92,11 +92,11 @@
     "rust-analyzer-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1712156296,
-        "narHash": "sha256-St7ZQrkrr5lmQX9wC1ZJAFxL8W7alswnyZk9d1se3Us=",
+        "lastModified": 1717583671,
+        "narHash": "sha256-+lRAmz92CNUxorqWusgJbL9VE1eKCnQQojglRemzwkw=",
         "owner": "rust-lang",
         "repo": "rust-analyzer",
-        "rev": "8e581ac348e223488622f4d3003cb2bd412bf27e",
+        "rev": "48bbdd6a74f3176987d5c809894ac33957000d19",
         "type": "github"
       },
       "original": {