diff --git a/.vscode/launch.json b/.vscode/launch.json
index 7336ebfa..099eaba6 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -6,7 +6,7 @@
             "type": "python",
             "request": "attach",
             "port": 5678,
-            "host": "localhost",
+            "host": "buildbot32.local",
             "pathMappings": [
                 {
                     "localRoot": "${workspaceFolder}",
@@ -16,4 +16,4 @@
         }
     ],
     "compounds": []
-}
+}
\ No newline at end of file
diff --git a/brewblox_devcon_spark/app_factory.py b/brewblox_devcon_spark/app_factory.py
index ea037c38..8cbd32bf 100644
--- a/brewblox_devcon_spark/app_factory.py
+++ b/brewblox_devcon_spark/app_factory.py
@@ -105,6 +105,9 @@ def create_app() -> FastAPI:
     setup_logging(config.debug, config.trace)
 
     if config.debugger:  # pragma: no cover
+        import faulthandler
+        faulthandler.enable()
+
         import debugpy
         debugpy.listen(('0.0.0.0', 5678))
         LOGGER.info('Debugger is enabled and listening on 5678')
diff --git a/poetry.lock b/poetry.lock
index 3ba777f7..2e2ebe4f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1090,22 +1090,24 @@ testing = ["pytest", "pytest-benchmark"]
 
 [[package]]
 name = "protobuf"
-version = "4.25.1"
+version = "4.24.4"
 description = ""
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.7"
 files = [
-    {file = "protobuf-4.25.1-cp310-abi3-win32.whl", hash = "sha256:193f50a6ab78a970c9b4f148e7c750cfde64f59815e86f686c22e26b4fe01ce7"},
-    {file = "protobuf-4.25.1-cp310-abi3-win_amd64.whl", hash = "sha256:3497c1af9f2526962f09329fd61a36566305e6c72da2590ae0d7d1322818843b"},
-    {file = "protobuf-4.25.1-cp37-abi3-macosx_10_9_universal2.whl", hash = "sha256:0bf384e75b92c42830c0a679b0cd4d6e2b36ae0cf3dbb1e1dfdda48a244f4bcd"},
-    {file = "protobuf-4.25.1-cp37-abi3-manylinux2014_aarch64.whl", hash = "sha256:0f881b589ff449bf0b931a711926e9ddaad3b35089cc039ce1af50b21a4ae8cb"},
-    {file = "protobuf-4.25.1-cp37-abi3-manylinux2014_x86_64.whl", hash = "sha256:ca37bf6a6d0046272c152eea90d2e4ef34593aaa32e8873fc14c16440f22d4b7"},
-    {file = "protobuf-4.25.1-cp38-cp38-win32.whl", hash = "sha256:abc0525ae2689a8000837729eef7883b9391cd6aa7950249dcf5a4ede230d5dd"},
-    {file = "protobuf-4.25.1-cp38-cp38-win_amd64.whl", hash = "sha256:1484f9e692091450e7edf418c939e15bfc8fc68856e36ce399aed6889dae8bb0"},
-    {file = "protobuf-4.25.1-cp39-cp39-win32.whl", hash = "sha256:8bdbeaddaac52d15c6dce38c71b03038ef7772b977847eb6d374fc86636fa510"},
-    {file = "protobuf-4.25.1-cp39-cp39-win_amd64.whl", hash = "sha256:becc576b7e6b553d22cbdf418686ee4daa443d7217999125c045ad56322dda10"},
-    {file = "protobuf-4.25.1-py3-none-any.whl", hash = "sha256:a19731d5e83ae4737bb2a089605e636077ac001d18781b3cf489b9546c7c80d6"},
-    {file = "protobuf-4.25.1.tar.gz", hash = "sha256:57d65074b4f5baa4ab5da1605c02be90ac20c8b40fb137d6a8df9f416b0d0ce2"},
+    {file = "protobuf-4.24.4-cp310-abi3-win32.whl", hash = "sha256:ec9912d5cb6714a5710e28e592ee1093d68c5ebfeda61983b3f40331da0b1ebb"},
+    {file = "protobuf-4.24.4-cp310-abi3-win_amd64.whl", hash = "sha256:1badab72aa8a3a2b812eacfede5020472e16c6b2212d737cefd685884c191085"},
+    {file = "protobuf-4.24.4-cp37-abi3-macosx_10_9_universal2.whl", hash = "sha256:8e61a27f362369c2f33248a0ff6896c20dcd47b5d48239cb9720134bef6082e4"},
+    {file = "protobuf-4.24.4-cp37-abi3-manylinux2014_aarch64.whl", hash = "sha256:bffa46ad9612e6779d0e51ae586fde768339b791a50610d85eb162daeb23661e"},
+    {file = "protobuf-4.24.4-cp37-abi3-manylinux2014_x86_64.whl", hash = "sha256:b493cb590960ff863743b9ff1452c413c2ee12b782f48beca77c8da3e2ffe9d9"},
+    {file = "protobuf-4.24.4-cp37-cp37m-win32.whl", hash = "sha256:dbbed8a56e56cee8d9d522ce844a1379a72a70f453bde6243e3c86c30c2a3d46"},
+    {file = "protobuf-4.24.4-cp37-cp37m-win_amd64.whl", hash = "sha256:6b7d2e1c753715dcfe9d284a25a52d67818dd43c4932574307daf836f0071e37"},
+    {file = "protobuf-4.24.4-cp38-cp38-win32.whl", hash = "sha256:02212557a76cd99574775a81fefeba8738d0f668d6abd0c6b1d3adcc75503dbe"},
+    {file = "protobuf-4.24.4-cp38-cp38-win_amd64.whl", hash = "sha256:2fa3886dfaae6b4c5ed2730d3bf47c7a38a72b3a1f0acb4d4caf68e6874b947b"},
+    {file = "protobuf-4.24.4-cp39-cp39-win32.whl", hash = "sha256:b77272f3e28bb416e2071186cb39efd4abbf696d682cbb5dc731308ad37fa6dd"},
+    {file = "protobuf-4.24.4-cp39-cp39-win_amd64.whl", hash = "sha256:9fee5e8aa20ef1b84123bb9232b3f4a5114d9897ed89b4b8142d81924e05d79b"},
+    {file = "protobuf-4.24.4-py3-none-any.whl", hash = "sha256:80797ce7424f8c8d2f2547e2d42bfbb6c08230ce5832d6c099a37335c9c90a92"},
+    {file = "protobuf-4.24.4.tar.gz", hash = "sha256:5a70731910cd9104762161719c3d883c960151eea077134458503723b60e3667"},
 ]
 
 [[package]]
@@ -1845,4 +1847,4 @@ h11 = ">=0.9.0,<1"
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.11,<4"
-content-hash = "c74110c6ad66915735859d348d00c6a70f1e38a5da6580d547496b367e1ed7c0"
+content-hash = "4a86a91d2245ae66a3805d5b16acdbba77ddbf8fd4e467314084528cb613484b"
diff --git a/pyproject.toml b/pyproject.toml
index 03c345ab..ff19111b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ readme = "README.md"
 [tool.poetry.dependencies]
 python = ">=3.11,<4"
 pyserial-asyncio = "^0.6"
-protobuf = "^4.24.3"
+protobuf = "<4.25"
 aiofiles = "^23.2.1"
 aiozeroconf = "^0.1.8"
 debugpy = "^1.5.1"