diff --git a/debian/postinst b/debian/postinst
index 42c5b1c..22f3432 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -56,7 +56,10 @@ case "$1" in
             exit 1
         fi
 
-        # Set Bluetooth capabilities on Python executable
+        # Set ownership of application directory BEFORE setting capabilities
+        chown -R sensorpajen:sensorpajen /opt/sensorpajen
+
+        # Set Bluetooth capabilities on Python executable (after ownership change)
         PYTHON_PATH=$(readlink -f /opt/sensorpajen/venv/bin/python3)
         if command -v setcap >/dev/null 2>&1; then
             setcap cap_net_raw,cap_net_admin+eip "$PYTHON_PATH" || {
@@ -67,9 +70,6 @@ case "$1" in
             echo "Warning: setcap not found (install libcap2-bin package)"
         fi
 
-        # Set ownership of application directory
-        chown -R sensorpajen:sensorpajen /opt/sensorpajen
-
         # Install systemd service file
         if [ -f /opt/sensorpajen/debian/sensorpajen.service ]; then
             cp /opt/sensorpajen/debian/sensorpajen.service /etc/systemd/system/