diff --git a/.gitmodules b/.gitmodules
index dcab5ca..62a88ac 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -6,4 +6,4 @@
 	url = https://github.com/kseo/sfnt2woff.git
 [submodule "vendor/woff2/source"]
 	path = vendor/woff2/source
-	url = https://github.com/google/woff2.git
+	url = https://github.com/copies/woff2.git
diff --git a/Cargo.toml b/Cargo.toml
index 47a1f88..fdad77b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "woff"
-version = "0.6.1"
-edition = "2021"
+version = "0.6.2"
+edition = "2024"
 license = "Apache-2.0 OR MIT"
 authors = ["Ivan Ukhov <ivan.ukhov@gmail.com>"]
 description = "The package provides a converter for Web Open Font Format."
diff --git a/src/version1/ffi.rs b/src/version1/ffi.rs
index b2cad5a..57b4047 100644
--- a/src/version1/ffi.rs
+++ b/src/version1/ffi.rs
@@ -1,4 +1,4 @@
-extern "C" {
+unsafe extern "C" {
     pub fn woffEncode(
         sfntData: *const u8,
         sfntLen: u32,
diff --git a/src/version2/ffi.rs b/src/version2/ffi.rs
index 33f2176..1926163 100644
--- a/src/version2/ffi.rs
+++ b/src/version2/ffi.rs
@@ -1,4 +1,4 @@
-extern "C" {
+unsafe extern "C" {
     pub fn ComputeTTFToWOFF2Size(
         data: *const u8,
         length: libc::size_t,
diff --git a/vendor/woff2/source b/vendor/woff2/source
index 0f4d304..8ae687e 160000
--- a/vendor/woff2/source
+++ b/vendor/woff2/source
@@ -1 +1 @@
-Subproject commit 0f4d304faa1c62994536dc73510305c7357da8d4
+Subproject commit 8ae687ef2aafce19082cccf356070e146d2fe666