diff --git a/backend/app/alembic/versions/7acc8c28d84c_changed_back_to_datetime.py b/backend/app/alembic/versions/7acc8c28d84c_changed_back_to_datetime.py
new file mode 100644
index 0000000..e50b50f
--- /dev/null
+++ b/backend/app/alembic/versions/7acc8c28d84c_changed_back_to_datetime.py
@@ -0,0 +1,29 @@
+"""changed back to datetime
+
+Revision ID: 7acc8c28d84c
+Revises: 16f759612879
+Create Date: 2024-10-08 12:27:12.985853
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel.sql.sqltypes
+
+
+# revision identifiers, used by Alembic.
+revision = '7acc8c28d84c'
+down_revision = '16f759612879'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/backend/app/models.py b/backend/app/models.py
index d3fc7ca..f97b97f 100644
--- a/backend/app/models.py
+++ b/backend/app/models.py
@@ -212,7 +212,7 @@ class CoursePublic(CourseBase):
     images: list["Image"] 
     info_images: list["Info_Image"]
     schedule: list["Schedule"]
-    created_at: str    
+    created_at: datetime    
     
 class CoursesPublic(SQLModel):
     data: list[CoursePublic]