diff --git a/README.md b/README.md
index 2bf54a47..905b3834 100644
--- a/README.md
+++ b/README.md
@@ -21,8 +21,8 @@ Currently FFmpeg 9.0.1 is built with the following packages enabled for all plat
 - png 1.6.58
 - webp 1.6.0
 - libvmaf 3.2.0
-- x264 32c3b801191522961102d4bea292cdb61068d0dd (except armv7l)
-- x265 4.2 (except armv7l)
+- x264 b35605ace3ddf7c1a5d67a2eb553f034aef41d55 (except armv7l)
+- x265 4.3
 
 The following additional packages are also enabled on Linux:
 
diff --git a/patches/x265.patch b/patches/x265.patch
new file mode 100644
index 00000000..1bb31e97
--- /dev/null
+++ b/patches/x265.patch
@@ -0,0 +1,24 @@
+--- a/source/CMakeLists.txt
++++ b/source/CMakeLists.txt
+@@ -47,7 +47,7 @@
+     string(TOLOWER "${CMAKE_SYSTEM_PROCESSOR}" SYSPROC)
+ endif()
+ set(X86_ALIASES x86 i386 i686 x86_64 amd64)
+-set(ARM_ALIASES armv6l armv7l)
++set(ARM_ALIASES armv6l armv7l armv8l)
+ set(ARM64_ALIASES arm64 arm64e aarch64)
+ set(RISCV64_ALIASES riscv64)
+ set(LOONGARCH64_ALIASES loongarch64)
+@@ -325,10 +325,10 @@
+     elseif(ARM)
+         find_package(Neon)
+         if(CPU_HAS_NEON)
+-            set(ARM_ARGS -mcpu=native -mfloat-abi=hard -mfpu=neon -marm -fPIC)
++            set(ARM_ARGS -march=armv7-a -mfloat-abi=hard -mfpu=neon -marm -fPIC)
+             add_definitions(-DHAVE_NEON)
+         else()
+-            set(ARM_ARGS -mcpu=native -mfloat-abi=hard -mfpu=vfp -marm)
++            set(ARM_ARGS -march=armv7-a -mfloat-abi=hard -mfpu=vfp -marm)
+         endif()
+     endif()
+     if(ARM64)
diff --git a/scripts/build-ffmpeg.py b/scripts/build-ffmpeg.py
index d74e8f32..239a7c5a 100644
--- a/scripts/build-ffmpeg.py
+++ b/scripts/build-ffmpeg.py
@@ -180,11 +180,10 @@ def main():
         "--enable-zlib",
     ]
 
-    # x264/x265 are skipped on 32-bit ARM (armv7)
+    # x264 is skipped on 32-bit ARM (armv7)
+    ffmpeg_package.build_arguments.append("--enable-libx265")
     if not is_arm32:
-        ffmpeg_package.build_arguments.extend(
-            ["--enable-libx264", "--enable-libx265"]
-        )
+        ffmpeg_package.build_arguments.append("--enable-libx264")
 
     if use_cuda:
         ffmpeg_package.build_arguments.extend(["--enable-nvenc", "--enable-nvdec"])
@@ -247,8 +246,8 @@ def main():
     if use_gnutls:
         packages += gnutls_group
     if is_arm32:
-        # x264/x265 are not built on 32-bit ARM (armv7)
-        packages += [p for p in codec_group if p.name not in {"x264", "x265"}]
+        # x264 is not built on 32-bit ARM (armv7)
+        packages += [p for p in codec_group if p.name != "x264"]
     else:
         packages += codec_group
     packages += [ffmpeg_package]
diff --git a/scripts/cibuildpkg.py b/scripts/cibuildpkg.py
index 85a0f6e9..e000c4a8 100644
--- a/scripts/cibuildpkg.py
+++ b/scripts/cibuildpkg.py
@@ -371,6 +371,15 @@ def _build_x265(self, package: Package) -> None:
             if disable_sve:
                 flags_high_bits.append("-DENABLE_SVE2=OFF")
 
+        # x265 greps /proc/cpuinfo for NEON, which reports the aarch64 host's
+        # flags ("asimd") inside the 32-bit ARM container. Its NEON .S files are
+        # assembled regardless, so tell it NEON is there or they get -mfpu=vfp.
+        arm32_flags = (
+            ["-DCPU_HAS_NEON=1"]
+            if platform.machine().lower() in {"armv7l", "armv8l", "arm"}
+            else []
+        )
+
         x265_12bits = replace(
             package,
             build_dir="x265-12bits",
@@ -411,7 +420,7 @@ def _build_x265(self, package: Package) -> None:
             "-DLINKED_10BIT=1",
             "-DLINKED_12BIT=1",
             "-DEXTRA_LINK_FLAGS=-L../x265-10bits -L../x265-12bits",
-        ] + (["-DENABLE_SVE2=OFF"] if disable_sve else [])
+        ] + (["-DENABLE_SVE2=OFF"] if disable_sve else []) + arm32_flags
         self._build_with_cmake(package=package, for_builder=False)
 
     def _extract(self, package: Package) -> None:
diff --git a/scripts/pkg.py b/scripts/pkg.py
index 963a431e..ebfc3b0d 100644
--- a/scripts/pkg.py
+++ b/scripts/pkg.py
@@ -150,8 +150,8 @@ def __lt__(self, other):
     ),
     Package(
         name="x265",
-        source_url="https://bitbucket.org/multicoreware/x265_git/downloads/x265_4.2.tar.gz",
-        sha256="40b1ea0453e0309f0eba934e0ddf533f8f6295966679e8894e8f1c1c8d5e1210",
+        source_url="https://github.com/Multicorewareinc/x265/releases/download/4.3/x265_4.3.tar.gz",
+        sha256="83c53e4c8bbb8f1e33ed59e10a7d621d1d7801ca853910c3eb41f038b8ffb121",
         build_system="cmake",
         source_dir="source",
     ),