diff --git a/migrations/20170920205112_fix_slugs_index/down.sql b/migrations/20170920205112_fix_slugs_index/down.sql
new file mode 100644
index 0000000..e69de29
diff --git a/migrations/20170920205112_fix_slugs_index/up.sql b/migrations/20170920205112_fix_slugs_index/up.sql
new file mode 100644
index 0000000..cd92904
--- /dev/null
+++ b/migrations/20170920205112_fix_slugs_index/up.sql
@@ -0,0 +1,2 @@
+DROP INDEX slugs_index;
+CREATE UNIQUE INDEX slugs_index ON article_revisions (slug) WHERE latest=1;