diff --git a/src/RustServer/benches/diff_bench.rs b/src/RustServer/benches/diff_bench.rs
index fcebe6b..afa5ffb 100644
--- a/src/RustServer/benches/diff_bench.rs
+++ b/src/RustServer/benches/diff_bench.rs
@@ -4,7 +4,7 @@ use std::ffi::CStr;
 use std::os::raw::c_char;
 
 // Import the FFI functions from the library crate
-extern "C" {
+unsafe extern "C" {
     fn rustserver_diff_trees(
         old_json_ptr: *const u8,
         old_json_len: i32,
diff --git a/src/RustServer/src/lib.rs b/src/RustServer/src/lib.rs
index b3f7abe..b155466 100644
--- a/src/RustServer/src/lib.rs
+++ b/src/RustServer/src/lib.rs
@@ -205,9 +205,9 @@ mod tests {
         let mut out_len: i32 = 0;
         let result = unsafe {
             rustserver_diff_trees(
-                old.as_ptr() as *const u8,
+                old.as_ptr(),
                 old.len() as i32,
-                new.as_ptr() as *const u8,
+                new.as_ptr(),
                 new.len() as i32,
                 &mut out_len,
             )
@@ -360,9 +360,9 @@ mod tests {
         let mut out_len: i32 = 0;
         let result = unsafe {
             rustserver_apply_patch(
-                json.as_ptr() as *const u8,
+                json.as_ptr(),
                 json.len() as i32,
-                patch.as_ptr() as *const u8,
+                patch.as_ptr(),
                 patch.len() as i32,
                 &mut out_len,
             )
@@ -415,7 +415,7 @@ mod tests {
             rustserver_apply_patch(
                 std::ptr::null(),
                 5,
-                patch.as_ptr() as *const u8,
+                patch.as_ptr(),
                 patch.len() as i32,
                 &mut out_len,
             )
@@ -430,7 +430,7 @@ mod tests {
         let mut out_len: i32 = -1;
         let result = unsafe {
             rustserver_apply_patch(
-                json.as_ptr() as *const u8,
+                json.as_ptr(),
                 json.len() as i32,
                 std::ptr::null(),
                 5,