diff --git a/.github/workflows/release_maixcam.yml b/.github/workflows/release_maixcam.yml
index 423418b3..beb431de 100644
--- a/.github/workflows/release_maixcam.yml
+++ b/.github/workflows/release_maixcam.yml
@@ -74,6 +74,7 @@ jobs:
           maixcdk_version_path="${MAIXCDK_PATH}/${maixcdk_version_name}"
           echo "maixcdk_version_path=$maixcdk_version_path" >> $GITHUB_OUTPUT
           echo "maixcdk_version_name=$maixcdk_version_name" >> $GITHUB_OUTPUT
+          cd $maixpy_path
 
       - name: Build OS
         id: build_os
@@ -81,7 +82,7 @@ jobs:
           echo "--------------------------------"
           echo "--      Generate system       --"
           echo "--------------------------------"
-          cd ${maixpy_path}/tools/os
+          cd tools/os
           chmod +x gen_os.sh
           date_now=`date +"%Y-%m-%d"`
           os_version_name="maixcam-${date_now}-maixpy-${maixpy_version}"
diff --git a/maix/version.py b/maix/version.py
index 1974e978..c449cc82 100644
--- a/maix/version.py
+++ b/maix/version.py
@@ -3,6 +3,6 @@
 
 version_major = 4
 version_minor = 4
-version_patch = 0
+version_patch = 1
 
 __version__ = "{}.{}.{}".format(version_major, version_minor, version_patch)