diff --git a/Cargo.toml b/Cargo.toml
index 4aee4be..899166d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
 name = "mimalloc"
-version = "0.1.48"
+version = "0.1.49"
 authors = [
     "Octavian Oncescu <octavonce@gmail.com>",
     "Vincent Rouillé <vincent@speedy37.fr>",
     "Thom Chiovoloni <chiovolonit@gmail.com>",
 ]
-edition = "2018"
+edition = "2024"
 repository = "https://github.com/purpleprotocol/mimalloc_rust"
 keywords = ["mimalloc", "allocator", "encrypted-heap", "performance"]
 categories = ["memory-management", "api-bindings"]
diff --git a/libmimalloc-sys/Cargo.toml b/libmimalloc-sys/Cargo.toml
index 67eeb4c..e078b97 100644
--- a/libmimalloc-sys/Cargo.toml
+++ b/libmimalloc-sys/Cargo.toml
@@ -1,8 +1,8 @@
 [package]
 name = "libmimalloc-sys"
-version = "0.1.44"
+version = "0.1.45"
 authors = ["Octavian Oncescu <octavonce@gmail.com>"]
-edition = "2018"
+edition = "2024"
 repository = "https://github.com/purpleprotocol/mimalloc_rust/tree/master/libmimalloc-sys"
 keywords = ["allocator", "encrypted-heap", "performance"]
 categories = ["memory-management", "api-bindings"]
@@ -29,7 +29,7 @@ cty = { version = "0.2", optional = true }
 libc = "0.2"
 
 [build-dependencies]
-cc = "1.0"
+cc = "1.2"
 
 [features]
 secure = []
diff --git a/libmimalloc-sys/c_src/mimalloc/v2 b/libmimalloc-sys/c_src/mimalloc/v2
index fbd8b99..6a53d72 160000
--- a/libmimalloc-sys/c_src/mimalloc/v2
+++ b/libmimalloc-sys/c_src/mimalloc/v2
@@ -1 +1 @@
-Subproject commit fbd8b99c2b828428947d70fdc046bb55609be93e
+Subproject commit 6a53d72d46a1a641d8e5793db37cb2da60e04192
diff --git a/libmimalloc-sys/c_src/mimalloc/v3 b/libmimalloc-sys/c_src/mimalloc/v3
index dfa50c3..7b7fca4 160000
--- a/libmimalloc-sys/c_src/mimalloc/v3
+++ b/libmimalloc-sys/c_src/mimalloc/v3
@@ -1 +1 @@
-Subproject commit dfa50c37d951128b1e77167dd9291081aa88eea4
+Subproject commit 7b7fca4b7013d77e356d96e055fec309cb3cbbd6
diff --git a/libmimalloc-sys/src/lib.rs b/libmimalloc-sys/src/lib.rs
index ff2442e..f371d98 100644
--- a/libmimalloc-sys/src/lib.rs
+++ b/libmimalloc-sys/src/lib.rs
@@ -10,7 +10,7 @@ mod extended;
 #[cfg(feature = "extended")]
 pub use extended::*;
 
-extern "C" {
+unsafe extern "C" {
     /// Allocate zero-initialized `size` bytes.
     ///
     /// Returns a pointer to newly allocated zero-initialized memory, or null if
diff --git a/libmimalloc-sys/sys-test/build.rs b/libmimalloc-sys/sys-test/build.rs
index 383f0dc..e4ef3a7 100644
--- a/libmimalloc-sys/sys-test/build.rs
+++ b/libmimalloc-sys/sys-test/build.rs
@@ -1,7 +1,8 @@
-use std::env;
+use std::{env, fs, path::PathBuf};
 
 fn main() {
     let cargo_manifest_dir = env!("CARGO_MANIFEST_DIR");
+    let out_dir = PathBuf::from(env::var("OUT_DIR").expect("OUT_DIR is set by cargo"));
     let secure = if env::var("CARGO_FEATURE_SECURE").is_ok() {
         Some("secure")
     } else {
@@ -55,5 +56,10 @@ fn main() {
             }
         });
 
-    cfg.generate("../src/lib.rs", "all.rs");
+    let source = fs::read_to_string("../src/lib.rs").expect("read libmimalloc-sys/src/lib.rs");
+    let ctest_source = source.replace("unsafe extern \"C\"", "extern \"C\"");
+    let ctest_input = out_dir.join("ctest-input.rs");
+    fs::write(&ctest_input, ctest_source).expect("write generated ctest input");
+
+    cfg.generate(ctest_input, "all.rs");
 }
diff --git a/libmimalloc-sys/sys-test/src/main.rs b/libmimalloc-sys/sys-test/src/main.rs
index 385a34d..7ae7ca0 100644
--- a/libmimalloc-sys/sys-test/src/main.rs
+++ b/libmimalloc-sys/sys-test/src/main.rs
@@ -1,4 +1,10 @@
-#![allow(bad_style, unused_imports, unused_macros, clippy::all)]
+#![allow(
+	bad_style,
+	unused_imports,
+	unused_macros,
+	function_casts_as_integer,
+	clippy::all
+)]
 
 use libmimalloc_sys::*;
 
diff --git a/src/lib.rs b/src/lib.rs
index 4288b2f..c12c383 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -48,22 +48,24 @@ pub struct MiMalloc;
 unsafe impl GlobalAlloc for MiMalloc {
     #[inline]
     unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
-        mi_malloc_aligned(layout.size(), layout.align()) as *mut u8
+        unsafe { mi_malloc_aligned(layout.size(), layout.align()) as *mut u8 }
     }
 
     #[inline]
     unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {
-        mi_zalloc_aligned(layout.size(), layout.align()) as *mut u8
+        unsafe { mi_zalloc_aligned(layout.size(), layout.align()) as *mut u8 }
     }
 
     #[inline]
     unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
-        mi_free(ptr as *mut c_void);
+        unsafe {
+            mi_free(ptr as *mut c_void);
+        }
     }
 
     #[inline]
     unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {
-        mi_realloc_aligned(ptr as *mut c_void, new_size, layout.align()) as *mut u8
+        unsafe { mi_realloc_aligned(ptr as *mut c_void, new_size, layout.align()) as *mut u8 }
     }
 }
 
diff --git a/test-override-with-dylib/Cargo.toml b/test-override-with-dylib/Cargo.toml
index c1381fc..4c174a9 100644
--- a/test-override-with-dylib/Cargo.toml
+++ b/test-override-with-dylib/Cargo.toml
@@ -7,11 +7,11 @@ edition = "2018"
 publish = false
 
 [dependencies]
-libc = { version = "^0.2.8", default-features = false }
+libc = { version = "^0.2.182", default-features = false }
 libmimalloc-sys = { path = "../libmimalloc-sys" }
 
 [build-dependencies]
-cc = "^1.0.13"
+cc = "^1.2.56"
 
 [features]
 override = ["libmimalloc-sys/override"]