diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 169e88e..7ad00f9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,7 +19,7 @@ jobs:
           cd ~/arduino*
           ./install.sh
           ./arduino --pref "boardsmanager.additional.urls=https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json" --save-prefs
-          ./arduino --install-boards esp32:esp32
+          ./arduino --install-boards esp32:esp32:2.0.9
       - name: Install Arduino CMake Toolchain
         uses: actions/checkout@v2
         with:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5622c28..03c54ca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -50,6 +50,7 @@ set(SRCFILES
         NetworkLock.cpp
         NetworkOpener.cpp
         networkDevices/NetworkDevice.h
+        networkDevices/NetworkDevice.cpp
         networkDevices/WifiDevice.cpp
         networkDevices/W5500Device.cpp
         networkDevices/EthLan8720Device.cpp