diff --git a/scripts/install b/scripts/install
index 0f83ce6..42149da 100755
--- a/scripts/install
+++ b/scripts/install
@@ -85,6 +85,16 @@ ynh_script_progression --message="Configuring system user..." --weight=1
 # Create a system user
 ynh_system_user_create --username=$app --home_dir="$final_path"
 
+if grep dialout -q < /etc/group; then
+	usermod -a -G dialout "$app"
+fi
+if grep i2c -q < /etc/group; then
+	usermod -a -G i2c "$app"
+fi
+if grep gpio -q < /etc/group; then
+	usermod -a -G gpio "$app"
+fi
+
 
 #=================================================
 # INSTALL EXTRA DEPENDENCIES
diff --git a/scripts/restore b/scripts/restore
index 21e2d1e..aa0db7b 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -50,6 +50,16 @@ ynh_script_progression --message="Recreating the dedicated system user..." --wei
 # Create the dedicated user (if not existing)
 ynh_system_user_create --username=$app --home_dir="$final_path"
 
+if grep dialout -q < /etc/group; then
+	usermod -a -G dialout "$app"
+fi
+if grep i2c -q < /etc/group; then
+	usermod -a -G i2c "$app"
+fi
+if grep gpio -q < /etc/group; then
+	usermod -a -G gpio "$app"
+fi
+
 #=================================================
 # INSTALL EXTRA DEPENDENCIES
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 67f6baf..14977b2 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -80,6 +80,16 @@ ynh_script_progression --message="Making sure dedicated system user exists..." -
 # Create a dedicated user (if not existing)
 ynh_system_user_create --username=$app --home_dir="$final_path"
 
+if grep dialout -q < /etc/group; then
+	usermod -a -G dialout "$app"
+fi
+if grep i2c -q < /etc/group; then
+	usermod -a -G i2c "$app"
+fi
+if grep gpio -q < /etc/group; then
+	usermod -a -G gpio "$app"
+fi
+
 #=================================================
 # UPGRADE DEPENDENCIES
 #=================================================