diff --git a/examples/Cargo.toml b/examples/Cargo.toml
index d11a2380db9..594d2191400 100644
--- a/examples/Cargo.toml
+++ b/examples/Cargo.toml
@@ -25,7 +25,7 @@ httpdate = "1.0"
 once_cell = "1.5.2"
 
 [target.'cfg(windows)'.dev-dependencies.windows-sys]
-version = "0.52"
+version = "0.59"
 
 [[example]]
 name = "chat"
diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml
index 565b5867efd..2ee0fab0d0e 100644
--- a/tokio/Cargo.toml
+++ b/tokio/Cargo.toml
@@ -123,11 +123,11 @@ libc = { version = "0.2.168" }
 nix = { version = "0.29.0", default-features = false, features = ["aio", "fs", "socket"] }
 
 [target.'cfg(windows)'.dependencies.windows-sys]
-version = "0.52"
+version = "0.59"
 optional = true
 
 [target.'cfg(windows)'.dev-dependencies.windows-sys]
-version = "0.52"
+version = "0.59"
 features = [
   "Win32_Foundation",
   "Win32_Security_Authorization",
diff --git a/tokio/src/net/windows/named_pipe.rs b/tokio/src/net/windows/named_pipe.rs
index 417e67b31dd..0d51335aea6 100644
--- a/tokio/src/net/windows/named_pipe.rs
+++ b/tokio/src/net/windows/named_pipe.rs
@@ -7,6 +7,7 @@ use std::ffi::OsStr;
 use std::io::{self, Read, Write};
 use std::pin::Pin;
 use std::ptr;
+use std::ptr::null_mut;
 use std::task::{Context, Poll};
 
 use crate::io::{AsyncRead, AsyncWrite, Interest, PollEvented, ReadBuf, Ready};
@@ -2556,7 +2557,7 @@ impl ClientOptions {
             attrs as *mut _,
             windows_sys::OPEN_EXISTING,
             self.get_flags(),
-            0,
+            null_mut(),
         );
 
         if h == windows_sys::INVALID_HANDLE_VALUE {
diff --git a/tokio/src/process/windows.rs b/tokio/src/process/windows.rs
index debd8567d04..c49df36b114 100644
--- a/tokio/src/process/windows.rs
+++ b/tokio/src/process/windows.rs
@@ -28,6 +28,7 @@ use std::os::windows::prelude::{AsRawHandle, IntoRawHandle, OwnedHandle, RawHand
 use std::pin::Pin;
 use std::process::Stdio;
 use std::process::{Child as StdChild, ExitStatus};
+use std::ptr::null_mut;
 use std::sync::Arc;
 use std::task::{Context, Poll};
 
@@ -119,7 +120,7 @@ impl Future for Child {
             }
             let (tx, rx) = oneshot::channel();
             let ptr = Box::into_raw(Box::new(Some(tx)));
-            let mut wait_object = 0;
+            let mut wait_object = null_mut();
             let rc = unsafe {
                 RegisterWaitForSingleObject(
                     &mut wait_object,