diff --git a/scripts/install b/scripts/install
index 0b3eb88..51ef5a4 100755
--- a/scripts/install
+++ b/scripts/install
@@ -10,7 +10,7 @@ ynh_script_progression "Setting up source files..."
 
 ynh_setup_source --dest_dir="$install_dir/app"
 
-chmod -R 750 "$install_dir"
+chmod -R "u=rX,g=rX,o=" "$install_dir"
 chown -R "$app:www-data" "$install_dir"
 
 #=================================================
@@ -21,8 +21,8 @@ ynh_script_progression "Adding $app's configuration..."
 mkdir -p "$install_dir/app/data/_data_/_default_/configs"
 ynh_config_add --template="application.ini" --destination="$install_dir/app/data/_data_/_default_/configs/application.ini"
 
-chown -R $app:$app "$install_dir/app/data"
-chmod -R 600 "$install_dir/app/data"
+chmod -R "u=rwX,g=,o=" "$install_dir/app/data"
+chown -R "$app:$app" "$install_dir/app/data"
 
 #=================================================
 # SETUP SSO
@@ -30,8 +30,8 @@ chmod -R 600 "$install_dir/app/data"
 ynh_script_progression "Applying SSO patch..."
 
 ynh_config_add --template="sso.php" --destination="$install_dir/index.php"
+chmod "u=rX,g=,o=" "$install_dir/index.php"
 chown "$app:www-data" "$install_dir/index.php"
-chmod 750 "$install_dir/index.php"
 
 #=================================================
 # SYSTEM CONFIGURATION
diff --git a/scripts/restore b/scripts/restore
index cbecfbd..de26cae 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -11,10 +11,13 @@ ynh_script_progression "Restoring the app main directory..."
 
 ynh_restore "$install_dir"
 
-chmod -R 750 "$install_dir"
+chmod -R "u=rX,g=rX,o=" "$install_dir"
 chown -R "$app:www-data" "$install_dir"
-chmod 600 "$install_dir/app/data/_data_/_default_/configs/application.ini"
-chown -R "$app:$app" "$install_dir/app/data/_data_"
+
+chmod -R "u=rwX,g=,o=" "$install_dir/app/data"
+chown -R "$app:$app" "$install_dir/app/data"
+
+chmod "u=rX,g=,o=" "$install_dir/index.php"
 
 #=================================================
 # RESTORE SYSTEM CONFIGURATIONS
diff --git a/scripts/upgrade b/scripts/upgrade
index b585cbd..cd1624b 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -24,7 +24,7 @@ ynh_script_progression "Upgrading source files..."
 
 ynh_setup_source --dest_dir="$install_dir/app" --full_replace=1 --keep="data/_data_/_default_/configs/application.ini"
 
-chmod -R 750 "$install_dir"
+chmod -R "u=rX,g=rX,o=" "$install_dir"
 chown -R "$app:www-data" "$install_dir"
 
 #=================================================
@@ -34,7 +34,7 @@ chown -R "$app:www-data" "$install_dir"
 
 #ynh_config_add --template="application.ini" --destination="$install_dir/app/data/_data_/_default_/configs/application.ini"
 
-chmod -R 600 "$install_dir/app/data"
+chmod -R "u=rwX,g=,o=" "$install_dir/app/data"
 chown -R "$app:$app" "$install_dir/app/data"
 
 #=================================================
@@ -43,8 +43,8 @@ chown -R "$app:$app" "$install_dir/app/data"
 ynh_script_progression "Applying SSO patch..."
 
 ynh_config_add --template="sso.php" --destination="$install_dir/index.php"
+chmod "u=rX,g=,o=" "$install_dir/index.php"
 chown "$app:www-data" "$install_dir/index.php"
-chmod 750 "$install_dir/index.php"
 
 #=================================================
 # REAPPLY SYSTEM CONFIGURATIONS