diff --git a/scripts/install b/scripts/install
index ca95e18..11a984d 100755
--- a/scripts/install
+++ b/scripts/install
@@ -24,6 +24,10 @@ ynh_script_progression --message="Setting up source files..." --weight=1
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source --dest_dir="$install_dir"
 
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
+chown -R $app:$app "$install_dir"
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 3f3f680..f84c432 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -39,6 +39,10 @@ then
 	ynh_setup_source --dest_dir="$install_dir"
 fi
 
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
+chown -R $app:$app "$install_dir"
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================