diff --git a/Cargo.toml b/Cargo.toml
index 183ca667..de003c32 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,20 +22,16 @@ categories = ["database"]
 duckdb = { version = "=1.3.0", path = "crates/duckdb" }
 libduckdb-sys = { version = "=1.3.0", path = "crates/libduckdb-sys" }
 duckdb-loadable-macros = { version = "=0.1.7", path = "crates/duckdb-loadable-macros" }
-autocfg = "1.0"
 bindgen = { version = "0.71.1", default-features = false }
-byteorder = "1.3"
 calamine = "0.22.0"
 cast = "0.3"
 cc = "1.0"
-chrono = "0.4.22"
-csv = "1.1"
+chrono = { version = "0.4.22", default-features = false, features = ["std", "clock"] }
 doc-comment = "0.3"
 fallible-iterator = "0.3"
 fallible-streaming-iterator = "0.1"
 flate2 = "1.0"
-hashlink = "0.9"
-lazy_static = "1.4"
+hashlink = "0.10"
 num = { version = "0.4", default-features = false }
 num-integer = "0.1.46"
 pkg-config = "0.3.24"
@@ -47,18 +43,15 @@ prettyplease = "0.2.20"
 proc-macro2 = "1.0.56"
 quote = "1.0.21"
 r2d2 = "0.8.9"
-rand = "0.8.3"
-regex = "1.6"
+rand = "0.9.0"
 rust_decimal = "1.14"
 serde = "1.0"
 serde_json = "1.0"
 smallvec = "1.6.1"
-strum = "0.25"
+strum = "0.27"
 syn = "2.0.15"
 tar = "0.4.38"
-tempdir = "0.3.7"
 tempfile = "3.1.0"
-unicase = "2.6.0"
 url = "2.1"
 uuid = "1.0"
 vcpkg = "0.2"
diff --git a/crates/duckdb/Cargo.toml b/crates/duckdb/Cargo.toml
index e6b86926..41ae110d 100644
--- a/crates/duckdb/Cargo.toml
+++ b/crates/duckdb/Cargo.toml
@@ -45,10 +45,7 @@ libduckdb-sys = { workspace = true }
 hashlink = { workspace = true }
 chrono = { workspace = true, optional = true }
 serde_json = { workspace = true, optional = true }
-csv = { workspace = true, optional = true }
 url = { workspace = true, optional = true }
-lazy_static = { workspace = true, optional = true }
-byteorder = { workspace = true, features = ["i128"], optional = true }
 fallible-iterator = { workspace = true }
 fallible-streaming-iterator = { workspace = true }
 uuid = { workspace = true, optional = true }
@@ -68,12 +65,8 @@ num-integer = { workspace = true }
 [dev-dependencies]
 doc-comment = { workspace = true }
 tempfile = { workspace = true }
-lazy_static = { workspace = true }
-regex = { workspace = true }
 uuid = { workspace = true, features = ["v4"] }
-unicase = { workspace = true }
 rand = { workspace = true }
-tempdir = { workspace = true }
 polars-core = { workspace = true }
 pretty_assertions = { workspace = true }
 # criterion = "0.3"
diff --git a/crates/duckdb/src/r2d2.rs b/crates/duckdb/src/r2d2.rs
index 1b498ef3..ec98f1e5 100644
--- a/crates/duckdb/src/r2d2.rs
+++ b/crates/duckdb/src/r2d2.rs
@@ -130,7 +130,7 @@ mod test {
     use crate::types::Value;
     use std::{sync::mpsc, thread};
 
-    use tempdir::TempDir;
+    use tempfile::TempDir;
 
     #[test]
     fn test_basic() -> Result<()> {
@@ -210,7 +210,7 @@ mod test {
     #[test]
     fn test_error_handling() -> Result<()> {
         //! We specify a directory as a database. This is bound to fail.
-        let dir = TempDir::new("r2d2-duckdb").expect("Could not create temporary directory");
+        let dir = TempDir::with_prefix("r2d2-duckdb").expect("Could not create temporary directory");
         let dirpath = dir.path().to_str().unwrap();
         assert!(DuckdbConnectionManager::file(dirpath).is_err());
         Ok(())
diff --git a/crates/libduckdb-sys/Cargo.toml b/crates/libduckdb-sys/Cargo.toml
index 13905d72..c3cd16ac 100644
--- a/crates/libduckdb-sys/Cargo.toml
+++ b/crates/libduckdb-sys/Cargo.toml
@@ -29,7 +29,6 @@ loadable-extension = ["prettyplease", "quote", "syn"]
 [dependencies]
 
 [build-dependencies]
-autocfg = { workspace = true }
 bindgen = { workspace = true, features = ["runtime"], optional = true }
 flate2 = { workspace = true }
 pkg-config = { workspace = true, optional = true }
diff --git a/crates/libduckdb-sys/openssl/mod.rs b/crates/libduckdb-sys/openssl/mod.rs
index 4877258a..d1978fcc 100644
--- a/crates/libduckdb-sys/openssl/mod.rs
+++ b/crates/libduckdb-sys/openssl/mod.rs
@@ -18,7 +18,6 @@
     clippy::unusual_byte_groupings
 )]
 
-extern crate autocfg;
 #[cfg(feature = "openssl_bindgen")]
 extern crate bindgen;
 extern crate cc;
@@ -107,8 +106,6 @@ pub fn get_openssl_v2() -> Result<(Vec<PathBuf>, PathBuf), ()> {
 }
 
 fn get_openssl() -> Result<(Vec<PathBuf>, PathBuf), ()> {
-    check_rustc_versions();
-
     check_ssl_kind()?;
 
     let target = env::var("TARGET").unwrap();
@@ -166,14 +163,6 @@ fn get_openssl() -> Result<(Vec<PathBuf>, PathBuf), ()> {
     Ok((lib_dirs, include_dir))
 }
 
-fn check_rustc_versions() {
-    let cfg = autocfg::new();
-
-    if cfg.probe_rustc_version(1, 31) {
-        println!("cargo:rustc-cfg=const_fn");
-    }
-}
-
 #[allow(clippy::let_and_return)]
 fn postprocess(include_dirs: &[PathBuf]) -> Version {
     let version = validate_headers(include_dirs);