diff --git a/alembic/versions/0001_initial.py b/alembic/versions/0001_initial.py
index 7a42e67..21aa018 100644
--- a/alembic/versions/0001_initial.py
+++ b/alembic/versions/0001_initial.py
@@ -15,7 +15,7 @@ depends_on = None
 
 
 def upgrade():
-    op.execute("CREATE TYPE user_role AS ENUM ('admin', 'user')")
+    op.execute("DO $$ BEGIN CREATE TYPE user_role AS ENUM ('admin', 'user'); EXCEPTION WHEN duplicate_object THEN NULL; END $$")
 
     op.create_table(
         "users",