diff --git a/migrations/versions/28e9e049850c_add_pinned_articles.py b/migrations/versions/28e9e049850c_add_pinned_articles.py
index adf2fdc..1efe5d0 100644
--- a/migrations/versions/28e9e049850c_add_pinned_articles.py
+++ b/migrations/versions/28e9e049850c_add_pinned_articles.py
@@ -14,8 +14,8 @@
 import sqlalchemy as sa
 
 def upgrade():
-    op.add_column("article", sa.Column("pinned_article", sa.Boolean(), nullable=False, server_default=False))
-    op.add_column("article_revision", sa.Column("pinned_article", sa.Boolean(), nullable=False, server_default=False))
+    op.add_column("article", sa.Column("pinned_article", sa.Boolean(), nullable=False, server_default="0"))
+    op.add_column("article_revision", sa.Column("pinned_article", sa.Boolean(), nullable=False, server_default="0"))
     pass