diff --git a/audioipc/Cargo.toml b/audioipc/Cargo.toml
index f09dd87..326e056 100644
--- a/audioipc/Cargo.toml
+++ b/audioipc/Cargo.toml
@@ -34,7 +34,7 @@ version = "0.35"
 default-features = false
 
 [target.'cfg(windows)'.dependencies]
-windows-sys = { version = "0.52", features = [
+windows-sys = { version = "0.61", features = [
         "Win32_Foundation",
         "Win32_Security",
         "Win32_Storage_FileSystem",
diff --git a/audioipc/src/lib.rs b/audioipc/src/lib.rs
index 7b1652e..07f61b8 100644
--- a/audioipc/src/lib.rs
+++ b/audioipc/src/lib.rs
@@ -170,7 +170,7 @@ pub(crate) unsafe fn close_target_handle(
     let ok = DuplicateHandle(
         target_process,
         target_handle_to_close as _,
-        0,
+        std::ptr::null_mut(),
         std::ptr::null_mut(),
         0,
         FALSE,
diff --git a/ipctest/Cargo.toml b/ipctest/Cargo.toml
index 1a905c5..6e2488e 100644
--- a/ipctest/Cargo.toml
+++ b/ipctest/Cargo.toml
@@ -21,7 +21,7 @@ log = "0.4"
 libc = "0.2"
 
 [target.'cfg(windows)'.dependencies]
-windows-sys = { version = "0.52", features = [
+windows-sys = { version = "0.61", features = [
     "Win32_Foundation",
     "Win32_System_Threading",
 ] }
diff --git a/ipctest/src/main.rs b/ipctest/src/main.rs
index bf1def3..c33dbf4 100644
--- a/ipctest/src/main.rs
+++ b/ipctest/src/main.rs
@@ -105,9 +105,9 @@ fn run(wait_for_debugger: bool) -> Result<()> {
     // Duplicate the handle into the child process and send the value via stdin.
     let client_handle = unsafe {
         let child_process = OpenProcess(PROCESS_DUP_HANDLE, FALSE, child_pid);
-        assert!(child_process != 0, "OpenProcess failed");
+        assert!(!child_process.is_null(), "OpenProcess failed");
 
-        let mut target_handle: HANDLE = 0;
+        let mut target_handle: HANDLE = std::ptr::null_mut();
         let ok = DuplicateHandle(
             GetCurrentProcess(),
             fd as HANDLE,
diff --git a/ipctest/tests/e2e.rs b/ipctest/tests/e2e.rs
index 1eb03a1..77b7552 100644
--- a/ipctest/tests/e2e.rs
+++ b/ipctest/tests/e2e.rs
@@ -114,9 +114,9 @@ fn multi_process_client_test() {
 
     let client_handle = unsafe {
         let child_process = OpenProcess(PROCESS_DUP_HANDLE, FALSE, child_pid);
-        assert!(child_process != 0, "OpenProcess failed");
+        assert!(!child_process.is_null(), "OpenProcess failed");
 
-        let mut target_handle: HANDLE = 0;
+        let mut target_handle: HANDLE = std::ptr::null_mut();
         let ok = DuplicateHandle(
             GetCurrentProcess(),
             fd as HANDLE,