diff --git a/package/ci/pybind11-system-includes.patch b/package/ci/pybind11-system-includes.patch
deleted file mode 100644
index 60d8954..0000000
--- a/package/ci/pybind11-system-includes.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/tools/pybind11Tools.cmake b/tools/pybind11Tools.cmake
-index 52a70c2..1e9d033 100644
---- a/tools/pybind11Tools.cmake
-+++ b/tools/pybind11Tools.cmake
-@@ -130,7 +130,7 @@ function(pybind11_add_module target_name)
- 
-   add_library(${target_name} ${lib_type} ${exclude_from_all} ${ARG_UNPARSED_ARGUMENTS})
- 
--  target_include_directories(${target_name}
-+  target_include_directories(${target_name} SYSTEM
-     PRIVATE ${PYBIND11_INCLUDE_DIR}  # from project CMakeLists.txt
-     PRIVATE ${pybind11_INCLUDE_DIR}  # from pybind11Config
-     PRIVATE ${PYTHON_INCLUDE_DIRS})
diff --git a/package/ci/setup-pybind11.sh b/package/ci/setup-pybind11.sh
index da2327a..553d896 100755
--- a/package/ci/setup-pybind11.sh
+++ b/package/ci/setup-pybind11.sh
@@ -1,17 +1,8 @@
 set -e
 
-wget --no-clobber https://github.com/pybind/pybind11/archive/v2.2.4.tar.gz && tar -xzf v2.2.4.tar.gz
+wget --no-clobber https://github.com/pybind/pybind11/archive/v2.3.0.tar.gz && tar -xzf v2.3.0.tar.gz
 
-cd pybind11-2.2.4
-
-# Patch the CMake macro to add include paths as SYSTEM because otherwise GCC
-# 4.8 gets very loud. This is already done in
-# https://github.com/pybind/pybind11/pull/1416 but it's opt-in and not part of
-# any release yet. For Git releases this is handled inside
-# src/python/CMakeLists.txt (detecting version and applying SYSTEM), but I want
-# to ensure compatibility with 2.2.4 *and* have useful CI output, so I am
-# patching it here as well.
-patch -p1 < $TRAVIS_BUILD_DIR/package/ci/pybind11-system-includes.patch
+cd pybind11-2.3.0
 
 mkdir -p build && cd build
 cmake .. \
diff --git a/package/ci/travis.yml b/package/ci/travis.yml
index db1941e..37e1f55 100644
--- a/package/ci/travis.yml
+++ b/package/ci/travis.yml
@@ -100,9 +100,15 @@ install:
 # Code coverage of python bindings
 - if [ "$TRAVIS_OS_NAME" == "linux" ] || [ "$TRAVIS_OS_NAME" == "osx" ]; then pip3 install coverage codecov; fi
 
-# pybind11 (cached)
+# pybind11 (cached). On macOS the version 2.3.0 needs a brew update, the stale
+# Travis image has just 2.2.4.
 - if [ "$TRAVIS_OS_NAME" == "linux" ] && [ ! -e "$HOME/pybind11/bin" ]; then $TRAVIS_BUILD_DIR/package/ci/setup-pybind11.sh; fi
-- if [ "$TRAVIS_OS_NAME" == "osx" ]; then HOMEBREW_NO_AUTO_UPDATE=1 brew install pybind11; fi
+- if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install pybind11; fi
+
+# numpy on macOS -- probably because we updated Homebrew to install new pybind
+# (and thus python as well, apparently), the preinstalled numpy is no longer
+# visible.
+- if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew upgrade numpy; fi
 
 # SwiftShader on Linux (cached). Taken from Chromium snapshot 587878
 # (swiftshader-bin Arch package).