diff --git a/DESCRIPTION b/DESCRIPTION
index 56ef935f5..a95e98318 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -118,5 +118,5 @@ Collate:
     'zzz.R'
 Config/rextendr/version: 0.3.1
 VignetteBuilder: knitr
-Config/polars/LibVersion: 0.39.0
-Config/polars/RustToolchainVersion: nightly-2024-03-28
+Config/polars/LibVersion: 0.39.1
+Config/polars/RustToolchainVersion: nightly-2024-04-15
diff --git a/R/expr__array.R b/R/expr__array.R
index 7c36f4778..35d5ffaca 100644
--- a/R/expr__array.R
+++ b/R/expr__array.R
@@ -18,15 +18,13 @@ ExprArr_sum = function() .pr$Expr$arr_sum(self)
 #' @return Expr
 #' @inherit ExprStr_to_titlecase details
 #' @aliases arr_max
-#' @examplesIf polars_info()$features$nightly
+#' @examples
 #' df = pl$DataFrame(
 #'   values = list(c(1, 2), c(3, 4), c(5, 6)),
 #'   schema = list(values = pl$Array(pl$Float64, 2))
 #' )
 #' df$with_columns(max = pl$col("values")$arr$max())
 ExprArr_max = function() {
-  check_feature("nightly", "in $arr$max():")
-
   .pr$Expr$arr_max(self)
 }
 
@@ -38,15 +36,13 @@ ExprArr_max = function() {
 #' @inherit ExprStr_to_titlecase details
 #' @return Expr
 #' @aliases arr_min
-#' @examplesIf polars_info()$features$nightly
+#' @examples
 #' df = pl$DataFrame(
 #'   values = list(c(1, 2), c(3, 4), c(5, 6)),
 #'   schema = list(values = pl$Array(pl$Float64, 2))
 #' )
 #' df$with_columns(min = pl$col("values")$arr$min())
 ExprArr_min = function() {
-  check_feature("nightly", "in $arr$min():")
-
   .pr$Expr$arr_min(self)
 }
 
diff --git a/src/rust/Cargo.lock b/src/rust/Cargo.lock
index 7a27f782f..85f787bf4 100644
--- a/src/rust/Cargo.lock
+++ b/src/rust/Cargo.lock
@@ -1354,8 +1354,8 @@ dependencies = [
 
 [[package]]
 name = "polars"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "getrandom",
  "polars-arrow",
@@ -1374,8 +1374,8 @@ dependencies = [
 
 [[package]]
 name = "polars-arrow"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "ahash",
  "atoi",
@@ -1421,8 +1421,8 @@ dependencies = [
 
 [[package]]
 name = "polars-compute"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "bytemuck",
  "either",
@@ -1436,8 +1436,8 @@ dependencies = [
 
 [[package]]
 name = "polars-core"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "ahash",
  "bitflags 2.4.2",
@@ -1470,8 +1470,8 @@ dependencies = [
 
 [[package]]
 name = "polars-error"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "avro-schema",
  "polars-arrow-format",
@@ -1482,8 +1482,8 @@ dependencies = [
 
 [[package]]
 name = "polars-io"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "ahash",
  "async-trait",
@@ -1523,8 +1523,8 @@ dependencies = [
 
 [[package]]
 name = "polars-json"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "ahash",
  "chrono",
@@ -1543,8 +1543,8 @@ dependencies = [
 
 [[package]]
 name = "polars-lazy"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "ahash",
  "bitflags 2.4.2",
@@ -1566,8 +1566,8 @@ dependencies = [
 
 [[package]]
 name = "polars-ops"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "ahash",
  "aho-corasick",
@@ -1602,8 +1602,8 @@ dependencies = [
 
 [[package]]
 name = "polars-parquet"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "ahash",
  "async-stream",
@@ -1627,8 +1627,8 @@ dependencies = [
 
 [[package]]
 name = "polars-pipe"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "crossbeam-channel",
  "crossbeam-queue",
@@ -1651,8 +1651,8 @@ dependencies = [
 
 [[package]]
 name = "polars-plan"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "ahash",
  "bytemuck",
@@ -1680,8 +1680,8 @@ dependencies = [
 
 [[package]]
 name = "polars-row"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "bytemuck",
  "polars-arrow",
@@ -1691,8 +1691,8 @@ dependencies = [
 
 [[package]]
 name = "polars-sql"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "hex",
  "polars-arrow",
@@ -1708,8 +1708,8 @@ dependencies = [
 
 [[package]]
 name = "polars-time"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "atoi",
  "chrono",
@@ -1728,8 +1728,8 @@ dependencies = [
 
 [[package]]
 name = "polars-utils"
-version = "0.39.0"
-source = "git+https://github.com/pola-rs/polars.git?rev=37c630320da0d0d3270d283cdafbf6b8402de069#37c630320da0d0d3270d283cdafbf6b8402de069"
+version = "0.39.1"
+source = "git+https://github.com/pola-rs/polars.git?rev=5e6854171b4883418c9dbc5dd20f1bb10a23f98f#5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
 dependencies = [
  "ahash",
  "bytemuck",
@@ -1781,7 +1781,7 @@ dependencies = [
 
 [[package]]
 name = "r-polars"
-version = "0.39.0"
+version = "0.39.1"
 dependencies = [
  "either",
  "extendr-api",
diff --git a/src/rust/Cargo.toml b/src/rust/Cargo.toml
index b9bcd0d39..8d16b5f14 100644
--- a/src/rust/Cargo.toml
+++ b/src/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "r-polars"
-version = "0.39.0"
+version = "0.39.1"
 edition = "2021"
 rust-version = "1.76.0"
 publish = false
@@ -52,8 +52,8 @@ serde_json = "*"
 smartstring = "1.0.1"
 state = "0.6.0"
 thiserror = "1.0.58"
-polars-core = { git = "https://github.com/pola-rs/polars.git", rev = "37c630320da0d0d3270d283cdafbf6b8402de069", default-features = false }
-polars-lazy = { git = "https://github.com/pola-rs/polars.git", rev = "37c630320da0d0d3270d283cdafbf6b8402de069", default-features = false }
+polars-core = { git = "https://github.com/pola-rs/polars.git", rev = "5e6854171b4883418c9dbc5dd20f1bb10a23f98f", default-features = false }
+polars-lazy = { git = "https://github.com/pola-rs/polars.git", rev = "5e6854171b4883418c9dbc5dd20f1bb10a23f98f", default-features = false }
 either = "1"
 #features copied from node-polars
 
@@ -93,6 +93,7 @@ features = [
   "extract_groups",
   "extract_jsonpath",
   "ewma",
+  "ewma_by",
   "find_many",
   "fmt",
   "interpolate",
@@ -154,4 +155,4 @@ features = [
   "zip_with",
 ]
 git = "https://github.com/pola-rs/polars.git"
-rev = "37c630320da0d0d3270d283cdafbf6b8402de069"
+rev = "5e6854171b4883418c9dbc5dd20f1bb10a23f98f"
diff --git a/tests/testthat/test-expr_array.R b/tests/testthat/test-expr_array.R
index 1600561a7..513a0e253 100644
--- a/tests/testthat/test-expr_array.R
+++ b/tests/testthat/test-expr_array.R
@@ -17,42 +17,8 @@ test_that("arr$sum", {
   )
 })
 
-# TODO: reenable if the upstream issue is fixed <https://github.com/pola-rs/polars/issues/15646>
-# test_that("arr$max and arr$min", {
-#   skip_if_not(polars_info()$features$nightly)
-
-#   df = pl$DataFrame(
-#     ints = list(1:2, c(1L, NA_integer_), c(NA_integer_, NA_integer_)),
-#     floats = list(c(1, 2), c(1, NA_real_), c(NA_real_, NA_real_)),
-#     schema = list(
-#       ints = pl$Array(pl$Int32, 2),
-#       floats = pl$Array(pl$Float32, 2)
-#     )
-#   )
-#   # max ---
-#   expect_identical(
-#     df$select(pl$col("ints")$arr$max())$to_list(),
-#     list(ints = c(2L, 1L, NA_integer_))
-#   )
-#   expect_identical(
-#     df$select(pl$col("floats")$arr$max())$to_list(),
-#     list(floats = c(2, 1, NA_real_))
-#   )
-
-#   # min ---
-#   expect_identical(
-#     df$select(pl$col("ints")$arr$min())$to_list(),
-#     list(ints = c(1L, 1L, NA_integer_))
-#   )
-#   expect_identical(
-#     df$select(pl$col("floats")$arr$min())$to_list(),
-#     list(floats = c(1, 1, NA_real_))
-#   )
-# })
-
-test_that("arr$max and arr$min error if the nightly feature is false", {
-  skip_if(polars_info()$features$nightly)
 
+test_that("arr$max and arr$min", {
   df = pl$DataFrame(
     ints = list(1:2, c(1L, NA_integer_), c(NA_integer_, NA_integer_)),
     floats = list(c(1, 2), c(1, NA_real_), c(NA_real_, NA_real_)),
@@ -62,13 +28,23 @@ test_that("arr$max and arr$min error if the nightly feature is false", {
     )
   )
   # max ---
-  expect_grepl_error(
-    df$select(pl$col("ints")$arr$max())$to_list()
+  expect_identical(
+    df$select(pl$col("ints")$arr$max())$to_list(),
+    list(ints = c(2L, 1L, NA_integer_))
+  )
+  expect_identical(
+    df$select(pl$col("floats")$arr$max())$to_list(),
+    list(floats = c(2, 1, NA_real_))
   )
 
   # min ---
-  expect_grepl_error(
-    df$select(pl$col("ints")$arr$min())$to_list()
+  expect_identical(
+    df$select(pl$col("ints")$arr$min())$to_list(),
+    list(ints = c(1L, 1L, NA_integer_))
+  )
+  expect_identical(
+    df$select(pl$col("floats")$arr$min())$to_list(),
+    list(floats = c(1, 1, NA_real_))
   )
 })
 
diff --git a/tools/lib-sums.tsv b/tools/lib-sums.tsv
deleted file mode 100644
index cb69a0822..000000000
--- a/tools/lib-sums.tsv
+++ /dev/null
@@ -1,6 +0,0 @@
-url	sha256sum
-https://github.com/pola-rs/r-polars/releases/download/lib-v0.39.0/libr_polars-0.39.0-aarch64-apple-darwin.tar.gz	43568dcce4a819c191ea27ec5db6559ccbe12df6edf8359a4299f0c25a8885bc
-https://github.com/pola-rs/r-polars/releases/download/lib-v0.39.0/libr_polars-0.39.0-aarch64-unknown-linux-gnu.tar.gz	5e443a902b1a982534e6c42fd3898ef8095cebe05d577286648d6ce63b3adc30
-https://github.com/pola-rs/r-polars/releases/download/lib-v0.39.0/libr_polars-0.39.0-x86_64-apple-darwin.tar.gz	2b1d3b2b981ffedcb2781778105ca6d013b6382555eb53d0a476ed4b721aff42
-https://github.com/pola-rs/r-polars/releases/download/lib-v0.39.0/libr_polars-0.39.0-x86_64-pc-windows-gnu.tar.gz	f3f21c17617f5e5688d04c843069a40998cf2fdc34dfa17cc18a171b003fe2b0
-https://github.com/pola-rs/r-polars/releases/download/lib-v0.39.0/libr_polars-0.39.0-x86_64-unknown-linux-gnu.tar.gz	2b3c1a8257f348a8fe28e30a2c7438ef01faf8ce87f2217748d0d12b696a6034