diff --git a/src/Upgrades/Upgrade7.sql b/src/Upgrades/Upgrade7.sql
new file mode 100644
index 00000000..ec16fbcf
--- /dev/null
+++ b/src/Upgrades/Upgrade7.sql
@@ -0,0 +1,3 @@
+CREATE UNIQUE INDEX idx_uq_postscore_post_id_user_id ON postscore(post_id, user_id);
+CREATE UNIQUE INDEX idx_uq_crossref_post_id_post2_id ON crossref(post_id, post2_id);
+