diff --git a/.github/workflows/pypi_publish.yml b/.github/workflows/pypi_publish.yml
index f53d93f..b2243a7 100644
--- a/.github/workflows/pypi_publish.yml
+++ b/.github/workflows/pypi_publish.yml
@@ -21,9 +21,7 @@
 
       - name: Install dependencies
         run: |
-          sudo apt-get update
-          sudo apt-get install python3-protobuf protobuf-compiler scons
-          python3 -m pip install --user --upgrade pyinstaller poetry
+          python3 -m pip install --user --upgrade pyinstaller poetry protobuf grpcio-tools
       
       - name: Build PyPI package
         run: |
diff --git a/extra/poetry/pyproject.toml b/extra/poetry/pyproject.toml
index 07910a9..b9af332 100644
--- a/extra/poetry/pyproject.toml
+++ b/extra/poetry/pyproject.toml
@@ -18,8 +18,8 @@
 
 [tool.poetry.dependencies]
 python = ">=2.7"
-protobuf = ">=3.6"
-grpcio-tools = {version = ">=1.26.0rc1", allow-prereleases = true, optional=true}
+protobuf = ">=3.19"
+grpcio-tools = ">=1.46.0"
 
 [tool.poetry.dev-dependencies]
 
diff --git a/generator/proto/Makefile b/generator/proto/Makefile
index ef5b4ef..a93d88f 100644
--- a/generator/proto/Makefile
+++ b/generator/proto/Makefile
@@ -1,4 +1,4 @@
-PROTOC?=protoc
+PROTOC?=../protoc
 
 all: nanopb_pb2.py