diff --git a/server/conf/evolutions/default/10.sql b/server/conf/evolutions/default/10.sql
new file mode 100644
index 0000000..ddfbcc7
--- /dev/null
+++ b/server/conf/evolutions/default/10.sql
@@ -0,0 +1,13 @@
+
+# --- !Ups
+
+ALTER TABLE transactions
+    ALTER COLUMN index SET NOT NULL,
+    ALTER COLUMN index DROP DEFAULT;
+
+
+# --- !Downs
+
+ALTER TABLE transactions
+    ALTER COLUMN index DROP NOT NULL,
+    ALTER COLUMN index SET DEFAULT NULL;