diff --git a/THIRD-PARTY-NOTICES.md b/THIRD-PARTY-NOTICES.md
index d274d1e3..2ea3f4cf 100644
--- a/THIRD-PARTY-NOTICES.md
+++ b/THIRD-PARTY-NOTICES.md
@@ -25,6 +25,7 @@ used under the terms of the following licences:
 | libpng        | [libpng License](https://github.com/pnggroup/libpng/blob/master/LICENSE)                                  |
 | librsvg       | LGPLv3                                                                                                    |
 | libtiff       | [libtiff License](https://gitlab.com/libtiff/libtiff/blob/master/LICENSE.md) (BSD-like)                   |
+| libultrahdr   | Apache-2.0 License                                                                                        |
 | libvips       | LGPLv3                                                                                                    |
 | libwebp       | New BSD License                                                                                           |
 | libxml2       | MIT Licence                                                                                               |
diff --git a/build/posix.sh b/build/posix.sh
index 8e29732b..c9ef01f8 100755
--- a/build/posix.sh
+++ b/build/posix.sh
@@ -356,6 +356,22 @@ CFLAGS="${CFLAGS} -O3" meson setup _build --default-library=static --buildtype=r
   -Dexamples=false -Dtests=false
 meson install -C _build --tag devel
 
+mkdir ${DEPS}/uhdr
+$CURL https://github.com/google/libultrahdr/archive/v${VERSION_UHDR}.tar.gz | tar xzC ${DEPS}/uhdr --strip-components=1
+cd ${DEPS}/uhdr
+# [PATCH] improper use of clamp macro
+$CURL https://github.com/google/libultrahdr/commit/5ed39d67cd31d254e84ebf76b03d4b7bcc12e2f7.patch | patch -p1
+# [PATCH] Add ppc64le and s390x to recognized architectures
+$CURL https://github.com/google/libultrahdr/pull/376.patch | patch -p1
+# Avoid architecture-specific compile flags
+sed -i'.bak' '/add_compile_options(-[mf]/d' CMakeLists.txt
+# Ensure install targets are enabled when cross-compiling
+sed -i'.bak' 's/CMAKE_CROSSCOMPILING AND UHDR_ENABLE_INSTALL/FALSE/' CMakeLists.txt
+CFLAGS="${CFLAGS} -O3" CXXFLAGS="${CXXFLAGS} -O3" cmake -G"Unix Makefiles" \
+  -DCMAKE_TOOLCHAIN_FILE=${ROOT}/Toolchain.cmake -DCMAKE_INSTALL_PREFIX=${TARGET} -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_BUILD_TYPE=Release \
+  -DBUILD_SHARED_LIBS=FALSE -DUHDR_BUILD_EXAMPLES=FALSE -DUHDR_MAX_DIMENSION=65500 ${WITHOUT_NEON:+-DUHDR_ENABLE_INTRINSICS=FALSE}
+make install/strip
+
 mkdir ${DEPS}/vips
 $CURL https://github.com/libvips/libvips/releases/download/v${VERSION_VIPS}/vips-${VERSION_VIPS}.tar.xz | tar xJC ${DEPS}/vips --strip-components=1
 cd ${DEPS}/vips
@@ -460,6 +476,7 @@ printf "{\n\
   \"proxy-libintl\": \"${VERSION_PROXY_LIBINTL}\",\n\
   \"rsvg\": \"${VERSION_RSVG}\",\n\
   \"tiff\": \"${VERSION_TIFF}\",\n\
+  \"uhdr\": \"${VERSION_UHDR}\",\n\
   \"vips\": \"${VERSION_VIPS}\",\n\
   \"webp\": \"${VERSION_WEBP}\",\n\
   \"xml2\": \"${VERSION_XML2}\",\n\
diff --git a/check-latest-versions.sh b/check-latest-versions.sh
index 0096fb4f..5f7504ca 100755
--- a/check-latest-versions.sh
+++ b/check-latest-versions.sh
@@ -48,6 +48,7 @@ version_latest "png" "$VERSION_PNG" "1705"
 version_latest "proxy-libintl" "$VERSION_PROXY_LIBINTL" "frida/proxy-libintl"
 version_latest "rsvg" "$VERSION_RSVG" "5420" "unstable"
 version_latest "tiff" "$VERSION_TIFF" "1738"
+version_latest "uhdr" "$VERSION_UHDR" "375187"
 #version_latest "vips" "$VERSION_VIPS" "5097" # Temporarily disabled to allow version 8.18.0 to roll in
 version_latest "webp" "$VERSION_WEBP" "1761"
 version_latest "xml2" "$VERSION_XML2" "1783"
diff --git a/versions.properties b/versions.properties
index 6f10143c..8b68bb4c 100644
--- a/versions.properties
+++ b/versions.properties
@@ -21,6 +21,7 @@ VERSION_PNG=1.6.53
 VERSION_PROXY_LIBINTL=0.5
 VERSION_RSVG=2.61.3
 VERSION_TIFF=4.7.1
+VERSION_UHDR=1.4.0
 VERSION_VIPS=8.17.3
 VERSION_WEBP=1.6.0
 VERSION_XML2=2.15.1