diff --git a/CTFd/admin/__init__.py b/CTFd/admin/__init__.py
index fe40cc82..2ff77721 100644
--- a/CTFd/admin/__init__.py
+++ b/CTFd/admin/__init__.py
@@ -110,7 +110,7 @@ def import_ctf():
 def export_ctf():
     backup = export_ctf_util()
     ctf_name = ctf_config.ctf_name()
-    day = datetime.datetime.now().strftime("%Y-%m-%d")
+    day = datetime.datetime.now().strftime("%Y-%m-%d_%T")
     full_name = u"{}.{}.zip".format(ctf_name, day)
     return send_file(
         backup, cache_timeout=-1, as_attachment=True, attachment_filename=full_name
diff --git a/manage.py b/manage.py
index e061d9cd..7013d050 100644
--- a/manage.py
+++ b/manage.py
@@ -61,7 +61,7 @@ def export_ctf(path=None):
                 shutil.copyfileobj(backup, target)
         else:
             name = ctf_name()
-            day = datetime.datetime.now().strftime("%Y-%m-%d")
+            day = datetime.datetime.now().strftime("%Y-%m-%d_%T")
             full_name = f"{name}.{day}.zip"
 
             with open(full_name, "wb") as target: