diff --git a/server/migrations/20191119023012-cascade-shares.js b/server/migrations/20191119023012-cascade-shares.js
new file mode 100644
index 000000000..bb40d3e25
--- /dev/null
+++ b/server/migrations/20191119023012-cascade-shares.js
@@ -0,0 +1,22 @@
+const tableName = 'shares';
+const constraintName = 'shares_documentId_fkey';
+
+module.exports = {
+  up: async (queryInterface, Sequelize) => {
+    await queryInterface.sequelize.query(`alter table "${tableName}" drop constraint "${constraintName}"`)
+    await queryInterface.sequelize.query(
+      `alter table "${tableName}"
+        add constraint "${constraintName}" foreign key("documentId") references "documents" ("id")
+        on delete cascade`
+    );
+  },
+
+  down: async (queryInterface, Sequelize) => {
+    await queryInterface.sequelize.query(`alter table "${tableName}" drop constraint "${constraintName}"`)
+    await queryInterface.sequelize.query(
+      `alter table "${tableName}"\
+        add constraint "${constraintName}" foreign key("documentId") references "documents" ("id")
+        on delete no action`
+    );
+  },
+};
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diff --git a/server/migrations/20191119023013-cascade-backlinks2.js b/server/migrations/20191119023013-cascade-backlinks2.js
new file mode 100644
index 000000000..b687a7eb5
--- /dev/null
+++ b/server/migrations/20191119023013-cascade-backlinks2.js
@@ -0,0 +1,22 @@
+const tableName = 'backlinks';
+const constraintName = 'backlinks_documentId_fkey';
+
+module.exports = {
+  up: async (queryInterface, Sequelize) => {
+    await queryInterface.sequelize.query(`alter table "${tableName}" drop constraint "${constraintName}"`)
+    await queryInterface.sequelize.query(
+      `alter table "${tableName}"
+        add constraint "${constraintName}" foreign key("documentId") references "documents" ("id")
+        on delete cascade`
+    );
+  },
+
+  down: async (queryInterface, Sequelize) => {
+    await queryInterface.sequelize.query(`alter table "${tableName}" drop constraint "${constraintName}"`)
+    await queryInterface.sequelize.query(
+      `alter table "${tableName}"\
+        add constraint "${constraintName}" foreign key("documentId") references "documents" ("id")
+        on delete no action`
+    );
+  },
+};
\ No newline at end of file