diff --git a/ports/ggml-speech/portfile.cmake b/ports/ggml-speech/portfile.cmake
index eadf8ce..c34efbe 100644
--- a/ports/ggml-speech/portfile.cmake
+++ b/ports/ggml-speech/portfile.cmake
@@ -1,11 +1,22 @@
-# ggml-speech: tetherto/qvac-ext-ggml@speech with the consolidated speech-stack
-# patch series and a `qvac-speech-` lib filename prefix.
+# ggml-speech: tetherto/qvac-ext-ggml@speech, including the iOS Metal
+# NULL-safety hardening from
+# https://github.com/tetherto/qvac-ext-ggml/pull/10 (PR-10's 3 commits
+# f21ff9a0 + b7dc01c7 + 0f54d9f7) now merged into the speech branch
+# as PR-10 merge 08d39f0c (`Merge pull request #10 from
+# ishanvohra2/fix/metal-ios-null-propagation`).
+#
+# The Android backend stack still uses the GGML_CPU_ALL_VARIANTS=ON
+# + GGML_CPU_REPACK=ON shape introduced in port-version 3 (per-arch
+# CPU dlopen variants on top of the Vulkan / OpenCL MODULE .so files);
+# only the Apple Metal path changes versus port-version 3, courtesy
+# of PR-10's NULL-safety hardening on `ggml_metal_device_init` /
+# `ggml_metal_buffer_init` etc.
 
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO tetherto/qvac-ext-ggml
-    REF 9562ed04757934cbe108bd40334027e26513509e
-    SHA512 78cd62947035fecd971b275e4abb2942d64d53e2b205d01c7e86daab7cb43851f0795db61138bba8de153d7e73aa4f66f32f7ec8b96667fddbc0f2b73c2ea104
+    REF 08d39f0c
+    SHA512 0e681f60ba0ad49b1cebda914ee065c0b29f301617970b968054089830029153f1be28012dfe2ced9c1014fe8605647ca68208544e9564b5d5f1c68dfd1e82e9
     HEAD_REF speech
 )
 
diff --git a/ports/ggml-speech/vcpkg.json b/ports/ggml-speech/vcpkg.json
index fd15972..a031ec4 100644
--- a/ports/ggml-speech/vcpkg.json
+++ b/ports/ggml-speech/vcpkg.json
@@ -1,8 +1,8 @@
 {
   "name": "ggml-speech",
   "version-date": "2026-04-09",
-  "port-version": 3,
-  "description": "Speech-stack flavour of ggml from tetherto/qvac-ext-ggml@speech. Library filenames are prefixed libqvac-speech-ggml-* so they coexist with libqvac-ggml-* (fabric/llm) and libqvac-diffusion-ggml-* on the same Android device. Mutually exclusive with the regular ggml port in the same triplet -- pick one per build.",
+  "port-version": 4,
+  "description": "Speech-stack flavour of ggml from tetherto/qvac-ext-ggml@speech, including the iOS Metal NULL-safety hardening from PR #10. Library filenames are prefixed libqvac-speech-ggml-* so they coexist with libqvac-ggml-* (fabric/llm) and libqvac-diffusion-ggml-* on the same Android device. Mutually exclusive with the regular ggml port in the same triplet -- pick one per build.",
   "homepage": "https://github.com/tetherto/qvac-ext-ggml/tree/speech",
   "license": "MIT",
   "dependencies": [
diff --git a/ports/tts-cpp/portfile.cmake b/ports/tts-cpp/portfile.cmake
index 4cc355a..2e047b1 100644
--- a/ports/tts-cpp/portfile.cmake
+++ b/ports/tts-cpp/portfile.cmake
@@ -1,6 +1,12 @@
 # tts-cpp: Resemble Chatterbox + Supertonic TTS in pure C++/ggml.
-# Sourced from the tts-cpp/ subfolder of tetherto/qvac-ext-lib-whisper.cpp;
+# Sourced from the tts-cpp/ subfolder of qvac-ext-lib-whisper.cpp;
 # consumes the ggml-speech port.
+#
+# Pinned at tetherto/qvac-ext-lib-whisper.cpp@master HEAD 60dc1504
+# (`Merge pull request #29 from GustavoA1604/master`), which lands
+# 907f3151 -- the "tts-cpp: Add dynamic backend selection for android"
+# change: registry-only `init_gpu_backend()` + Adreno tier policy
+# + EngineOptions::backends_dir / opencl_cache_dir.
 
 set(VCPKG_POLICY_MISMATCHED_NUMBER_OF_BINARIES enabled)
 set(VCPKG_BUILD_TYPE release)
@@ -8,8 +14,8 @@ set(VCPKG_BUILD_TYPE release)
 vcpkg_from_github(
     OUT_SOURCE_PATH WHISPER_CPP_SRC
     REPO tetherto/qvac-ext-lib-whisper.cpp
-    REF f5f914b9714bc1a48ef63cc9e79d082fd63eb085
-    SHA512 5bd99c053b94909346ffec07ba882240fb1120770c0d2177e0df70bf39841136baeb72dda312465d2bd3fd2367f3cea49003bb6b9e17b22411b2905a8e1fa8d3
+    REF 60dc1504
+    SHA512 2273e95bb7fa9a4db757f675627529094d8665baffc0c1c1783a65c7670222b779ae39667325fe870dccd92037faacb44502700e923bde73149eac08e6ab8eff
     HEAD_REF master
 )
 
diff --git a/ports/tts-cpp/vcpkg.json b/ports/tts-cpp/vcpkg.json
index 1026428..c80a266 100644
--- a/ports/tts-cpp/vcpkg.json
+++ b/ports/tts-cpp/vcpkg.json
@@ -1,14 +1,13 @@
 {
   "name": "tts-cpp",
-  "version-date": "2026-05-07",
-  "port-version": 1,
-  "description": "Text-to-speech inference in pure C++/ggml. Ships Resemble Chatterbox (Turbo + Multilingual variants) and Supertonic engines under a unified Engine API. Sourced from tetherto/qvac-ext-lib-whisper.cpp's tts-cpp/ subfolder; consumes the ggml-speech port.",
+  "version-date": "2026-05-20",
+  "description": "Text-to-speech inference in pure C++/ggml. Ships Resemble Chatterbox (Turbo + Multilingual variants) and Supertonic engines under a unified Engine API. Sourced from tetherto/qvac-ext-lib-whisper.cpp's tts-cpp/ subfolder (including the Android dynamic backend selection landed in PR #29); consumes the ggml-speech port.",
   "homepage": "https://github.com/tetherto/qvac-ext-lib-whisper.cpp/tree/master/tts-cpp",
   "license": "MIT",
   "dependencies": [
     {
       "name": "ggml-speech",
-      "version>=": "2026-04-09#1"
+      "version>=": "2026-04-09#4"
     },
     {
       "name": "vcpkg-cmake",
diff --git a/versions/baseline.json b/versions/baseline.json
index 8fe26fa..dc342dd 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -22,7 +22,7 @@
     },
     "ggml-speech": {
       "baseline": "2026-04-09",
-      "port-version": 3
+      "port-version": 4
     },
     "intgemm": {
       "baseline": "1.0.0",
@@ -105,8 +105,8 @@
       "port-version": 2
     },
     "tts-cpp": {
-      "baseline": "2026-05-07",
-      "port-version": 1
+      "baseline": "2026-05-20",
+      "port-version": 0
     },
     "vcpkg-cmake": {
       "baseline": "2024-04-23",
diff --git a/versions/g-/ggml-speech.json b/versions/g-/ggml-speech.json
index c02c09f..8a962a5 100644
--- a/versions/g-/ggml-speech.json
+++ b/versions/g-/ggml-speech.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "b9dab610a65a30450a9779870879a864efe3308a",
+      "version-date": "2026-04-09",
+      "port-version": 4
+    },
     {
       "git-tree": "aee4ede215db602f9ab95eea6d50a1a36ef8f8e0",
       "version-date": "2026-04-09",
diff --git a/versions/t-/tts-cpp.json b/versions/t-/tts-cpp.json
index d0bed43..87857c3 100644
--- a/versions/t-/tts-cpp.json
+++ b/versions/t-/tts-cpp.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "fffb35210a3fdc7ef5407f87ca3616b584aa6531",
+      "version-date": "2026-05-20",
+      "port-version": 0
+    },
     {
       "git-tree": "084b9b1423945040791a94be810897ce565ab5ec",
       "version-date": "2026-05-07",