diff --git a/Cargo.lock b/Cargo.lock
index 978dccc686d5..56ce723cb74e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2662,7 +2662,7 @@ dependencies = [
 
 [[package]]
 name = "polars"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "ahash",
  "apache-avro",
@@ -2691,7 +2691,7 @@ dependencies = [
 
 [[package]]
 name = "polars-arrow"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "ahash",
  "arrow-array",
@@ -2759,7 +2759,7 @@ dependencies = [
 
 [[package]]
 name = "polars-compute"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "bytemuck",
  "either",
@@ -2774,7 +2774,7 @@ dependencies = [
 
 [[package]]
 name = "polars-core"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "ahash",
  "arrow-array",
@@ -2809,7 +2809,7 @@ dependencies = [
 
 [[package]]
 name = "polars-doc-examples"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "aws-config",
  "aws-sdk-s3",
@@ -2822,7 +2822,7 @@ dependencies = [
 
 [[package]]
 name = "polars-error"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "avro-schema",
  "object_store",
@@ -2834,7 +2834,7 @@ dependencies = [
 
 [[package]]
 name = "polars-ffi"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "polars-arrow",
  "polars-core",
@@ -2842,7 +2842,7 @@ dependencies = [
 
 [[package]]
 name = "polars-io"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "ahash",
  "async-trait",
@@ -2886,7 +2886,7 @@ dependencies = [
 
 [[package]]
 name = "polars-json"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "ahash",
  "chrono",
@@ -2905,7 +2905,7 @@ dependencies = [
 
 [[package]]
 name = "polars-lazy"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "ahash",
  "bitflags 2.5.0",
@@ -2931,7 +2931,7 @@ dependencies = [
 
 [[package]]
 name = "polars-ops"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "ahash",
  "aho-corasick",
@@ -2966,7 +2966,7 @@ dependencies = [
 
 [[package]]
 name = "polars-parquet"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "ahash",
  "async-stream",
@@ -2993,7 +2993,7 @@ dependencies = [
 
 [[package]]
 name = "polars-pipe"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "crossbeam-channel",
  "crossbeam-queue",
@@ -3018,7 +3018,7 @@ dependencies = [
 
 [[package]]
 name = "polars-plan"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "ahash",
  "bytemuck",
@@ -3051,7 +3051,7 @@ dependencies = [
 
 [[package]]
 name = "polars-row"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "bytemuck",
  "polars-arrow",
@@ -3061,7 +3061,7 @@ dependencies = [
 
 [[package]]
 name = "polars-sql"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "hex",
  "polars-arrow",
@@ -3077,7 +3077,7 @@ dependencies = [
 
 [[package]]
 name = "polars-time"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "atoi",
  "chrono",
@@ -3096,7 +3096,7 @@ dependencies = [
 
 [[package]]
 name = "polars-utils"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "ahash",
  "bytemuck",
diff --git a/Cargo.toml b/Cargo.toml
index ef1f8dbc40f5..57ed2c8a6382 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ default-members = [
 # ]
 
 [workspace.package]
-version = "0.39.0"
+version = "0.39.1"
 authors = ["Ritchie Vink <ritchie46@gmail.com>"]
 edition = "2021"
 homepage = "https://www.pola.rs/"
@@ -87,22 +87,22 @@ zstd = "0.13"
 uuid = { version = "1.7.0", features = ["v4"] }
 arboard = { version = "3.3.2", default-features = false }
 
-polars = { version = "0.39.0", path = "crates/polars", default-features = false }
-polars-compute = { version = "0.39.0", path = "crates/polars-compute", default-features = false }
-polars-core = { version = "0.39.0", path = "crates/polars-core", default-features = false }
-polars-error = { version = "0.39.0", path = "crates/polars-error", default-features = false }
-polars-ffi = { version = "0.39.0", path = "crates/polars-ffi", default-features = false }
-polars-io = { version = "0.39.0", path = "crates/polars-io", default-features = false }
-polars-json = { version = "0.39.0", path = "crates/polars-json", default-features = false }
-polars-lazy = { version = "0.39.0", path = "crates/polars-lazy", default-features = false }
-polars-ops = { version = "0.39.0", path = "crates/polars-ops", default-features = false }
-polars-parquet = { version = "0.39.0", path = "crates/polars-parquet", default-features = false }
-polars-pipe = { version = "0.39.0", path = "crates/polars-pipe", default-features = false }
-polars-plan = { version = "0.39.0", path = "crates/polars-plan", default-features = false }
-polars-row = { version = "0.39.0", path = "crates/polars-row", default-features = false }
-polars-sql = { version = "0.39.0", path = "crates/polars-sql", default-features = false }
-polars-time = { version = "0.39.0", path = "crates/polars-time", default-features = false }
-polars-utils = { version = "0.39.0", path = "crates/polars-utils", default-features = false }
+polars = { version = "0.39.1", path = "crates/polars", default-features = false }
+polars-compute = { version = "0.39.1", path = "crates/polars-compute", default-features = false }
+polars-core = { version = "0.39.1", path = "crates/polars-core", default-features = false }
+polars-error = { version = "0.39.1", path = "crates/polars-error", default-features = false }
+polars-ffi = { version = "0.39.1", path = "crates/polars-ffi", default-features = false }
+polars-io = { version = "0.39.1", path = "crates/polars-io", default-features = false }
+polars-json = { version = "0.39.1", path = "crates/polars-json", default-features = false }
+polars-lazy = { version = "0.39.1", path = "crates/polars-lazy", default-features = false }
+polars-ops = { version = "0.39.1", path = "crates/polars-ops", default-features = false }
+polars-parquet = { version = "0.39.1", path = "crates/polars-parquet", default-features = false }
+polars-pipe = { version = "0.39.1", path = "crates/polars-pipe", default-features = false }
+polars-plan = { version = "0.39.1", path = "crates/polars-plan", default-features = false }
+polars-row = { version = "0.39.1", path = "crates/polars-row", default-features = false }
+polars-sql = { version = "0.39.1", path = "crates/polars-sql", default-features = false }
+polars-time = { version = "0.39.1", path = "crates/polars-time", default-features = false }
+polars-utils = { version = "0.39.1", path = "crates/polars-utils", default-features = false }
 
 [workspace.dependencies.arrow-format]
 package = "polars-arrow-format"
@@ -110,7 +110,7 @@ version = "0.1.0"
 
 [workspace.dependencies.arrow]
 package = "polars-arrow"
-version = "0.39.0"
+version = "0.39.1"
 path = "crates/polars-arrow"
 default-features = false
 features = [
diff --git a/crates/polars-arrow/src/buffer/immutable.rs b/crates/polars-arrow/src/buffer/immutable.rs
index 158a0ed4f61d..ba813acb0ec0 100644
--- a/crates/polars-arrow/src/buffer/immutable.rs
+++ b/crates/polars-arrow/src/buffer/immutable.rs
@@ -1,6 +1,5 @@
 use std::ops::Deref;
 use std::sync::Arc;
-use std::usize;
 
 use either::Either;
 use num_traits::Zero;
diff --git a/crates/polars-core/src/chunked_array/drop.rs b/crates/polars-core/src/chunked_array/drop.rs
index f92503dda242..280aa15c6ed2 100644
--- a/crates/polars-core/src/chunked_array/drop.rs
+++ b/crates/polars-core/src/chunked_array/drop.rs
@@ -7,10 +7,11 @@ impl<T: PolarsDataType> Drop for ChunkedArray<T> {
             // SAFETY:
             // guarded by the type system
             // the transmute only convinces the type system that we are a list
-            // (which we are)
             #[allow(clippy::transmute_undefined_repr)]
             unsafe {
-                drop_list(std::mem::transmute(self))
+                drop_list(std::mem::transmute::<&mut ChunkedArray<T>, &ListChunked>(
+                    self,
+                ))
             }
         }
     }
diff --git a/crates/polars-core/src/chunked_array/ops/bit_repr.rs b/crates/polars-core/src/chunked_array/ops/bit_repr.rs
index 0eeb27a521ed..3ccc0624d1c3 100644
--- a/crates/polars-core/src/chunked_array/ops/bit_repr.rs
+++ b/crates/polars-core/src/chunked_array/ops/bit_repr.rs
@@ -112,7 +112,7 @@ where
             if matches!(self.dtype(), DataType::UInt64) {
                 let ca = self.clone();
                 // Convince the compiler we are this type. This keeps flags.
-                return unsafe { std::mem::transmute(ca) };
+                return unsafe { std::mem::transmute::<ChunkedArray<T>, UInt64Chunked>(ca) };
             }
             reinterpret_chunked_array(self)
         } else {
@@ -125,7 +125,7 @@ where
             if matches!(self.dtype(), DataType::UInt32) {
                 let ca = self.clone();
                 // Convince the compiler we are this type. This preserves flags.
-                return unsafe { std::mem::transmute(ca) };
+                return unsafe { std::mem::transmute::<ChunkedArray<T>, UInt32Chunked>(ca) };
             }
             reinterpret_chunked_array(self)
         } else {
diff --git a/crates/polars-core/src/series/implementations/object.rs b/crates/polars-core/src/series/implementations/object.rs
index d60b474c376d..7db6e2b55bef 100644
--- a/crates/polars-core/src/series/implementations/object.rs
+++ b/crates/polars-core/src/series/implementations/object.rs
@@ -229,6 +229,7 @@ mod test {
 
     #[test]
     fn test_downcast_object() -> PolarsResult<()> {
+        #[allow(non_local_definitions)]
         impl PolarsObject for i32 {
             fn type_name() -> &'static str {
                 "i32"
diff --git a/crates/polars-json/src/ndjson/deserialize.rs b/crates/polars-json/src/ndjson/deserialize.rs
index 27fbd5c422bd..35961e96c9a2 100644
--- a/crates/polars-json/src/ndjson/deserialize.rs
+++ b/crates/polars-json/src/ndjson/deserialize.rs
@@ -20,8 +20,7 @@ pub fn deserialize_iter<'a>(
     count: usize,
 ) -> PolarsResult<ArrayRef> {
     let mut arr: Vec<Box<dyn Array>> = Vec::new();
-    let mut buf =
-        String::with_capacity(std::cmp::min(buf_size + count + 2, std::u32::MAX as usize));
+    let mut buf = String::with_capacity(std::cmp::min(buf_size + count + 2, u32::MAX as usize));
     buf.push('[');
 
     fn _deserializer(s: &mut str, data_type: ArrowDataType) -> PolarsResult<Box<dyn Array>> {
@@ -41,7 +40,7 @@ pub fn deserialize_iter<'a>(
         buf.push(',');
 
         let next_row_length = row_iter.peek().map(|row| row.len()).unwrap_or(0);
-        if buf.len() + next_row_length >= std::u32::MAX as usize {
+        if buf.len() + next_row_length >= u32::MAX as usize {
             let _ = buf.pop();
             buf.push(']');
             arr.push(_deserializer(&mut buf, data_type.clone())?);
diff --git a/crates/polars-pipe/src/pipeline/convert.rs b/crates/polars-pipe/src/pipeline/convert.rs
index 5cd430989892..73afa86fea0a 100644
--- a/crates/polars-pipe/src/pipeline/convert.rs
+++ b/crates/polars-pipe/src/pipeline/convert.rs
@@ -18,7 +18,7 @@ use crate::executors::{operators, sources};
 use crate::expressions::PhysicalPipedExpr;
 use crate::operators::{Operator, Sink as SinkTrait, Source};
 use crate::pipeline::dispatcher::ThreadedSink;
-use crate::pipeline::PipeLine;
+use crate::pipeline::{PhysOperator, PipeLine};
 
 pub type CallBacks = PlHashMap<Node, PlaceHolder>;
 
@@ -758,7 +758,9 @@ where
 
     Ok(PipeLine::new(
         source_objects,
-        unsafe { std::mem::transmute(operator_objects) },
+        unsafe {
+            std::mem::transmute::<Vec<Box<dyn Operator>>, Vec<PhysOperator>>(operator_objects)
+        },
         sinks,
         verbose,
     ))
diff --git a/py-polars/src/lib.rs b/py-polars/src/lib.rs
index 00193e5158c1..4199a76fb0cc 100644
--- a/py-polars/src/lib.rs
+++ b/py-polars/src/lib.rs
@@ -1,6 +1,7 @@
 #![feature(vec_into_raw_parts)]
 #![allow(clippy::nonstandard_macro_braces)] // Needed because clippy does not understand proc macro of PyO3
 #![allow(clippy::transmute_undefined_repr)]
+#![allow(non_local_definitions)]
 #![allow(clippy::too_many_arguments)] // Python functions can have many arguments due to default arguments
 extern crate polars as polars_rs;
 
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 9b6fc432e939..bd59164eb3de 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,2 +1,2 @@
 [toolchain]
-channel = "nightly-2024-03-28"
+channel = "nightly-2024-04-15"