diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index b4b3177..8c6b281 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -12,8 +12,8 @@ on:
       - main
 
 jobs:
-  ubuntu-latest:
-    runs-on: ubuntu-latest
+  release-ubuntu-2004:
+    runs-on: ubuntu-20.04
 
     steps:
       - name: Clone
@@ -24,9 +24,10 @@ jobs:
         id: depends
         run: |
           sudo apt-get update
-          sudo apt-get install -y build-essential cmake libpython3-dev
-          pip3 install torch --index-url https://download.pytorch.org/whl/cpu
-          pip3 install transformers tiktoken pyinstaller
+          sudo apt-get install -y build-essential libpython3-dev
+          python3 -m pip install cmake
+          python3 -m pip install torch --index-url https://download.pytorch.org/whl/cpu
+          python3 -m pip install transformers tiktoken pyinstaller
 
       - name: Build backend server
         id: cmake_build_backend_server
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 22b6789..5e5c8fd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.17)
+cmake_minimum_required(VERSION 3.16)
 set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
 project(flatline C CXX)
 set(CMAKE_CXX_STANDARD 20)