diff --git a/.github/workflows/CI_build_linux.yml b/.github/workflows/CI_build_linux.yml
index 7d973fe..493eb30 100644
--- a/.github/workflows/CI_build_linux.yml
+++ b/.github/workflows/CI_build_linux.yml
@@ -14,7 +14,7 @@ jobs:
       - name: install dependencies
         run: |
              sudo apt install alsa-base libasound2-dev python3-tk python3-numpy
-             python3 -m pip install pyinstaller simpleaudio setuptools
+             python3 -m pip install pyinstaller simpleaudio setuptools intelhex
 
       - name: Build CI
         run: |
diff --git a/.github/workflows/CI_build_windows.yml b/.github/workflows/CI_build_windows.yml
index 4a1f73a..5a19a5e 100644
--- a/.github/workflows/CI_build_windows.yml
+++ b/.github/workflows/CI_build_windows.yml
@@ -13,7 +13,7 @@ jobs:
 
       - name: install dependencies
         run: |
-             python3 -m pip install pyinstaller simpleaudio setuptools tk numpy
+             python3 -m pip install pyinstaller simpleaudio setuptools tk numpy intelhex
 
       - name: Build CI
         run: |