diff --git a/src/app.py b/src/app.py
index 3084e88ed..0b8544292 100644
--- a/src/app.py
+++ b/src/app.py
@@ -2365,7 +2365,9 @@ def _check_manifest_requirements(manifest: Dict, action: str):
     logger.debug(m18n.n("app_requirements_checking", app=app_id))
 
     # Yunohost version requirement
-    yunohost_requirement = version.parse(manifest["integration"]["yunohost"].strip(">= ") or "4.3")
+    yunohost_requirement = version.parse(
+        manifest["integration"]["yunohost"].strip(">= ") or "4.3"
+    )
     yunohost_installed_version = version.parse(
         get_ynh_package_version("yunohost")["version"]
     )
diff --git a/src/certificate.py b/src/certificate.py
index 577048777..928bea499 100644
--- a/src/certificate.py
+++ b/src/certificate.py
@@ -457,6 +457,7 @@ investigate :
 
     try:
         import smtplib
+
         smtp = smtplib.SMTP("localhost")
         smtp.sendmail(from_, [to_], message.encode("utf-8"))
         smtp.quit()