diff --git a/README.md b/README.md
index feb2aa57e96e..b381350fce96 100644
--- a/README.md
+++ b/README.md
@@ -222,7 +222,7 @@ point to the `main` branch of this repo.
 polars = { git = "https://github.com/pola-rs/polars", rev = "<optional git tag>" }
 ```
 
-Required Rust version `>=1.65`.
+Required Rust version `>=1.71`.
 
 ## Contributing
 
diff --git a/crates/nano-arrow/src/array/dictionary/value_map.rs b/crates/nano-arrow/src/array/dictionary/value_map.rs
index 5a12534766bd..f9d22edfffe5 100644
--- a/crates/nano-arrow/src/array/dictionary/value_map.rs
+++ b/crates/nano-arrow/src/array/dictionary/value_map.rs
@@ -43,9 +43,7 @@ pub struct Hashed<K> {
 
 #[inline]
 fn ahash_hash<T: Hash + ?Sized>(value: &T) -> u64 {
-    let mut hasher = BuildHasherDefault::<ahash::AHasher>::default().build_hasher();
-    value.hash(&mut hasher);
-    hasher.finish()
+    BuildHasherDefault::<ahash::AHasher>::default().hash_one(value)
 }
 
 impl<K> Hash for Hashed<K> {
diff --git a/crates/polars-core/src/hashing/vector_hasher.rs b/crates/polars-core/src/hashing/vector_hasher.rs
index 5a481e24a5c1..0d5c5b64ec9a 100644
--- a/crates/polars-core/src/hashing/vector_hasher.rs
+++ b/crates/polars-core/src/hashing/vector_hasher.rs
@@ -42,12 +42,8 @@ pub(crate) const fn folded_multiply(s: u64, by: u64) -> u64 {
 pub(crate) fn get_null_hash_value(random_state: RandomState) -> u64 {
     // we just start with a large prime number and hash that twice
     // to get a constant hash value for null/None
-    let mut hasher = random_state.build_hasher();
-    3188347919usize.hash(&mut hasher);
-    let first = hasher.finish();
-    let mut hasher = random_state.build_hasher();
-    first.hash(&mut hasher);
-    hasher.finish()
+    let first = random_state.hash_one(3188347919usize);
+    random_state.hash_one(first)
 }
 
 fn insert_null_hash(chunks: &[ArrayRef], random_state: RandomState, buf: &mut Vec<u64>) {
@@ -392,13 +388,8 @@ where
         buf.clear();
         buf.reserve(self.len());
 
-        self.downcast_iter().for_each(|arr| {
-            buf.extend(arr.into_iter().map(|opt_v| {
-                let mut hasher = random_state.build_hasher();
-                opt_v.hash(&mut hasher);
-                hasher.finish()
-            }))
-        });
+        self.downcast_iter()
+            .for_each(|arr| buf.extend(arr.into_iter().map(|opt_v| random_state.hash_one(opt_v))));
 
         Ok(())
     }
@@ -406,9 +397,8 @@ where
     fn vec_hash_combine(&self, random_state: RandomState, hashes: &mut [u64]) -> PolarsResult<()> {
         self.apply_to_slice(
             |opt_v, h| {
-                let mut hasher = random_state.build_hasher();
-                opt_v.hash(&mut hasher);
-                _boost_hash_combine(hasher.finish(), *h)
+                let hashed = random_state.hash_one(opt_v);
+                _boost_hash_combine(hashed, *h)
             },
             hashes,
         );
diff --git a/crates/polars-io/src/cloud/options.rs b/crates/polars-io/src/cloud/options.rs
index 8866b0f5c8d8..78aedaf8e90f 100644
--- a/crates/polars-io/src/cloud/options.rs
+++ b/crates/polars-io/src/cloud/options.rs
@@ -30,8 +30,8 @@ use smartstring::alias::String as SmartString;
 use url::Url;
 
 #[cfg(feature = "aws")]
-static BUCKET_REGION: Lazy<tokio::sync::Mutex<FastFixedCache<SmartString, SmartString>>> =
-    Lazy::new(|| tokio::sync::Mutex::new(FastFixedCache::default()));
+static BUCKET_REGION: Lazy<std::sync::Mutex<FastFixedCache<SmartString, SmartString>>> =
+    Lazy::new(|| std::sync::Mutex::new(FastFixedCache::new(32)));
 
 /// The type of the config keys must satisfy the following requirements:
 /// 1. must be easily collected into a HashMap, the type required by the object_crate API.
@@ -146,10 +146,13 @@ impl CloudOptions {
                 .get_config_value(&AmazonS3ConfigKey::Region)
                 .is_none()
         {
-            let mut bucket_region = BUCKET_REGION.lock().await;
             let bucket = crate::cloud::CloudLocation::new(url)?.bucket;
+            let region = {
+                let bucket_region = BUCKET_REGION.lock().unwrap();
+                bucket_region.get(bucket.as_str()).cloned()
+            };
 
-            match bucket_region.get(bucket.as_str()) {
+            match region {
                 Some(region) => {
                     builder = builder.with_config(AmazonS3ConfigKey::Region, region.as_str())
                 },
@@ -165,6 +168,7 @@ impl CloudOptions {
                     if let Some(region) = result.headers().get("x-amz-bucket-region") {
                         let region =
                             std::str::from_utf8(region.as_bytes()).map_err(to_compute_err)?;
+                        let mut bucket_region = BUCKET_REGION.lock().unwrap();
                         bucket_region.insert(bucket.into(), region.into());
                         builder = builder.with_config(AmazonS3ConfigKey::Region, region)
                     }
diff --git a/crates/polars-ops/src/frame/hashing.rs b/crates/polars-ops/src/frame/hashing.rs
index e4bfb2f9c11d..245f125edfb9 100644
--- a/crates/polars-ops/src/frame/hashing.rs
+++ b/crates/polars-ops/src/frame/hashing.rs
@@ -1,4 +1,4 @@
-use std::hash::{BuildHasher, Hash, Hasher};
+use std::hash::Hash;
 
 use ahash::RandomState;
 use hashbrown::hash_map::RawEntryMut;
@@ -88,11 +88,7 @@ where
             .map(|iter| {
                 // create hashes and keys
                 iter.into_iter()
-                    .map(|val| {
-                        let mut hasher = build_hasher.build_hasher();
-                        val.hash(&mut hasher);
-                        (hasher.finish(), val)
-                    })
+                    .map(|val| (build_hasher.hash_one(&val), val))
                     .collect_trusted::<Vec<_>>()
             })
             .collect()
diff --git a/crates/polars-ops/src/frame/join/hash_join/single_keys_dispatch.rs b/crates/polars-ops/src/frame/join/hash_join/single_keys_dispatch.rs
index 5b8428738e4f..fefb207af236 100644
--- a/crates/polars-ops/src/frame/join/hash_join/single_keys_dispatch.rs
+++ b/crates/polars-ops/src/frame/join/hash_join/single_keys_dispatch.rs
@@ -366,9 +366,7 @@ pub fn prepare_bytes<'a>(
             .map(|ca| {
                 ca.into_iter()
                     .map(|opt_b| {
-                        let mut state = hb.build_hasher();
-                        opt_b.hash(&mut state);
-                        let hash = state.finish();
+                        let hash = hb.hash_one(opt_b);
                         BytesHash::new(opt_b, hash)
                     })
                     .collect::<Vec<_>>()
diff --git a/crates/polars-ops/src/frame/join/mod.rs b/crates/polars-ops/src/frame/join/mod.rs
index 3a2e4fef7abd..4c7fff623464 100644
--- a/crates/polars-ops/src/frame/join/mod.rs
+++ b/crates/polars-ops/src/frame/join/mod.rs
@@ -12,7 +12,7 @@ mod merge_sorted;
 #[cfg(feature = "chunked_ids")]
 use std::borrow::Cow;
 use std::fmt::{Debug, Display, Formatter};
-use std::hash::{BuildHasher, Hash, Hasher};
+use std::hash::Hash;
 
 use ahash::RandomState;
 pub use args::*;
diff --git a/crates/polars-ops/src/series/ops/approx_algo/hyperloglogplus.rs b/crates/polars-ops/src/series/ops/approx_algo/hyperloglogplus.rs
index 133e4e3f8298..7df61317d9bc 100644
--- a/crates/polars-ops/src/series/ops/approx_algo/hyperloglogplus.rs
+++ b/crates/polars-ops/src/series/ops/approx_algo/hyperloglogplus.rs
@@ -16,10 +16,10 @@
 //!     assert_eq!(hllp.count(), 2);
 //! ```
 
-use std::hash::{BuildHasher, Hash, Hasher};
+use std::hash::Hash;
 use std::marker::PhantomData;
 
-use polars_core::export::ahash::{AHasher, RandomState};
+use polars_core::export::ahash::RandomState;
 
 /// The greater is P, the smaller the error.
 const HLL_P: usize = 14_usize;
@@ -85,9 +85,7 @@ where
     /// reasonable performance.
     #[inline]
     fn hash_value(&self, obj: &T) -> u64 {
-        let mut hasher: AHasher = SEED.build_hasher();
-        obj.hash(&mut hasher);
-        hasher.finish()
+        SEED.hash_one(obj)
     }
 
     /// Adds an element to the HyperLogLog.
diff --git a/crates/polars-plan/src/logical_plan/optimizer/cse.rs b/crates/polars-plan/src/logical_plan/optimizer/cse.rs
index 6ad2d63ef1e4..11e4c45ca925 100644
--- a/crates/polars-plan/src/logical_plan/optimizer/cse.rs
+++ b/crates/polars-plan/src/logical_plan/optimizer/cse.rs
@@ -1,7 +1,6 @@
 //! Common Subplan Elimination
 
 use std::collections::{BTreeMap, BTreeSet};
-use std::hash::{BuildHasher, Hash, Hasher};
 
 use polars_core::prelude::*;
 
@@ -310,9 +309,7 @@ pub(crate) fn elim_cmn_subplans(
             (Some(h), _) => *h,
             (_, Some(h)) => *h,
             _ => {
-                let mut h = hb.build_hasher();
-                node1.hash(&mut h);
-                let hash = h.finish();
+                let hash = hb.hash_one(node1);
                 let mut cache_id = lp_cache.wrapping_add(hash as usize);
                 // this ensures we can still add branch ids without overflowing
                 // during the dot representation
diff --git a/crates/polars-utils/src/functions.rs b/crates/polars-utils/src/functions.rs
index 88cc128e6a6a..47bece31d73d 100644
--- a/crates/polars-utils/src/functions.rs
+++ b/crates/polars-utils/src/functions.rs
@@ -1,4 +1,4 @@
-use std::hash::{BuildHasher, Hash, Hasher};
+use std::hash::{BuildHasher, Hash};
 
 // Faster than collecting from a flattened iterator.
 pub fn flatten<T: Clone, R: AsRef<[T]>>(bufs: &[R], len: Option<usize>) -> Vec<T> {
@@ -20,7 +20,5 @@ pub fn hash_to_partition(h: u64, n_partitions: usize) -> usize {
 
 #[inline]
 pub fn get_hash<T: Hash, B: BuildHasher>(value: T, hb: &B) -> u64 {
-    let mut hasher = hb.build_hasher();
-    value.hash(&mut hasher);
-    hasher.finish()
+    hb.hash_one(value)
 }
diff --git a/py-polars/tests/unit/dataframe/test_df.py b/py-polars/tests/unit/dataframe/test_df.py
index b5c38891f41f..ed181ea6ca51 100644
--- a/py-polars/tests/unit/dataframe/test_df.py
+++ b/py-polars/tests/unit/dataframe/test_df.py
@@ -1601,7 +1601,7 @@ def test_reproducible_hash_with_seeds() -> None:
     if platform.mac_ver()[-1] != "arm64":
         expected = pl.Series(
             "s",
-            [13477868900383131459, 988796329533502010, 16840582678788620208],
+            [13477868900383131459, 6344663067812082469, 16840582678788620208],
             dtype=pl.UInt64,
         )
         result = df.hash_rows(*seeds)
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index a28c6ce5f0fe..4a5741c539f4 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,2 +1,2 @@
 [toolchain]
-channel = "nightly-2023-10-02"
+channel = "nightly-2023-10-12"