diff --git a/app/api/formations.py b/app/api/formations.py
index e87f9941..002ce739 100644
--- a/app/api/formations.py
+++ b/app/api/formations.py
@@ -280,5 +280,5 @@ def moduleimpl(moduleimpl_id: int):
     query = ModuleImpl.query.filter_by(id=moduleimpl_id)
     if g.scodoc_dept:
         query = query.join(FormSemestre).filter_by(dept_id=g.scodoc_dept_id)
-    modimpl = query.first_or_404()
-    return jsonify(modimpl.to_dict())
+    modimpl: ModuleImpl = query.first_or_404()
+    return jsonify(modimpl.to_dict(convert_objects=True))
diff --git a/app/scodoc/sco_archives.py b/app/scodoc/sco_archives.py
index ac795578..71acd815 100644
--- a/app/scodoc/sco_archives.py
+++ b/app/scodoc/sco_archives.py
@@ -231,7 +231,7 @@ class BaseArchiver(object):
         log(f"creating archive: {archive_id}")
         try:
             scu.GSL.acquire()
-            os.mkdir(archive_id)  # if exists, raises an OSError
+            os.mkdir(archive_id)  # if exists, raises FileExistsError
         finally:
             scu.GSL.release()
         self.store(archive_id, "_description.txt", description)
diff --git a/sco_version.py b/sco_version.py
index ed1190cd..9687e7ae 100644
--- a/sco_version.py
+++ b/sco_version.py
@@ -1,7 +1,7 @@
 # -*- mode: python -*-
 # -*- coding: utf-8 -*-
 
-SCOVERSION = "9.3.40"
+SCOVERSION = "9.3.41"
 
 SCONAME = "ScoDoc"