diff --git a/bazel/ray_deps_setup.bzl b/bazel/ray_deps_setup.bzl
index 697becedd..7a9f7d199 100644
--- a/bazel/ray_deps_setup.bzl
+++ b/bazel/ray_deps_setup.bzl
@@ -113,25 +113,20 @@ def ray_deps_setup():
         # declaring it here allows us to avoid patching the latter.
         name = "boost",
         build_file = "@com_github_nelhage_rules_boost//:BUILD.boost",
-        sha256 = "da3411ea45622579d419bfda66f45cd0f8c32a181d84adfa936f5688388995cf",
-        strip_prefix = "boost_1_68_0",
-        url = "https://dl.bintray.com/boostorg/release/1.68.0/source/boost_1_68_0.tar.gz",
+        sha256 = "96b34f7468f26a141f6020efb813f1a2f3dfb9797ecf76a7d7cbd843cc95f5bd",
+        strip_prefix = "boost_1_71_0",
+        url = "https://dl.bintray.com/boostorg/release/1.71.0/source/boost_1_71_0.tar.gz",
         patches = [
             "//thirdparty/patches:boost-exception-no_warn_typeid_evaluated.patch",
-            # Prefer compiler intrinsics; they're faster & avoid linker issues
-            "//thirdparty/patches:boost-interlocked-prefer-intrinsics.patch",
-            # Backport Clang-Cl patch on Boost 1.69 to Boost <= 1.68:
-            #   https://lists.boost.org/Archives/boost/2018/09/243420.php
-            "//thirdparty/patches:boost-type_traits-trivial_move.patch",
         ],
     )
 
     github_repository(
         name = "com_github_nelhage_rules_boost",
         # If you update the Boost version, remember to update the 'boost' rule.
-        commit = "df908358c605a7d5b8bbacde07afbaede5ac12cf",
+        commit = "5b53112431ef916381d6969f114727cc4f83960b",
         remote = "https://github.com/nelhage/rules_boost",
-        sha256 = "3775c5ab217e0c9cc380f56e243a4d75fe6fee8eaee1447899eaa04c5d582cf1",
+        sha256 = "4481db75d1d25b4f043f17a6c2d5f963782e659ad5049e027146b5248d37bf6b",
         patches = [
             "//thirdparty/patches:rules_boost-undefine-boost_fallthrough.patch",
             "//thirdparty/patches:rules_boost-windows-linkopts.patch",
diff --git a/src/shims/windows/unistd.h b/src/shims/windows/unistd.h
index ea8cd4224..d0a04284d 100644
--- a/src/shims/windows/unistd.h
+++ b/src/shims/windows/unistd.h
@@ -2,8 +2,9 @@
 #define UNISTD_H
 
 #include <getopt.h>
+#include <io.h>       // open/read/write/close
+#include <process.h>  // getpid
 
-#include <io.h>  // open/read/write/close
 #ifndef EXTERN_C
 #ifdef __cplusplus
 #define EXTERN_C extern "C"
diff --git a/thirdparty/patches/boost-interlocked-prefer-intrinsics.patch b/thirdparty/patches/boost-interlocked-prefer-intrinsics.patch
deleted file mode 100644
index 9c2039b27..000000000
--- a/thirdparty/patches/boost-interlocked-prefer-intrinsics.patch
+++ /dev/null
@@ -1,10 +0,0 @@
-diff --git boost/detail/interlocked.hpp boost/detail/interlocked.hpp
---- boost/detail/interlocked.hpp
-+++ boost/detail/interlocked.hpp
-@@ -21,1 +21,1 @@
--#if defined( BOOST_USE_WINDOWS_H )
-+#if 0
-@@ -33,1 +33,1 @@
--#elif defined( BOOST_USE_INTRIN_H )
-+#elif defined( BOOST_USE_INTRIN_H ) || defined(_WIN32)
--- 
diff --git a/thirdparty/patches/boost-type_traits-trivial_move.patch b/thirdparty/patches/boost-type_traits-trivial_move.patch
deleted file mode 100644
index 9f9a843cd..000000000
--- a/thirdparty/patches/boost-type_traits-trivial_move.patch
+++ /dev/null
@@ -1,32 +0,0 @@
-From ad326841ecca3e1a31102d5ddaf4e82f55a13742 Mon Sep 17 00:00:00 2001
-From: jzmaddock <john@johnmaddock.co.uk>
-Date: Fri, 3 Aug 2018 18:31:46 +0100
-Subject: [PATCH] Correct spelling of "__clang__" so that the headers compile
- on clang/windows.
-
----
- boost/type_traits/has_trivial_move_assign.hpp      | 2 +-
- boost/type_traits/has_trivial_move_constructor.hpp | 2 +-
- 2 files changed, 2 insertions(+), 2 deletions(-)
-
-diff --git boost/type_traits/has_trivial_move_assign.hpp boost/type_traits/has_trivial_move_assign.hpp
-index 6d954ab..7b39269 100644
---- boost/type_traits/has_trivial_move_assign.hpp
-+++ boost/type_traits/has_trivial_move_assign.hpp
-@@ -27,4 +27,4 @@
--#if defined(__GNUC__) || defined(__clang)
-+#if defined(__GNUC__) || defined(__clang__)
- #include <boost/type_traits/is_assignable.hpp>
- #include <boost/type_traits/is_volatile.hpp>
- #endif
-diff --git boost/type_traits/has_trivial_move_constructor.hpp boost/type_traits/has_trivial_move_constructor.hpp
-index 5784f4b..2ecfc36 100644
---- boost/type_traits/has_trivial_move_constructor.hpp
-+++ boost/type_traits/has_trivial_move_constructor.hpp
-@@ -25,4 +25,4 @@
--#if defined(__GNUC__) || defined(__clang)
-+#if defined(__GNUC__) || defined(__clang__)
- #include <boost/type_traits/is_constructible.hpp>
- #include <boost/type_traits/is_volatile.hpp>
- #endif
---