diff --git a/sql/v0.9.3-v0.9.4.sql b/sql/v0.9.3-v0.9.4.sql
new file mode 100644
index 00000000..ca8b3194
--- /dev/null
+++ b/sql/v0.9.3-v0.9.4.sql
@@ -0,0 +1,27 @@
+SET SESSION AUTHORIZATION 'postgres';
+
+BEGIN transaction;
+
+DO $$
+DECLARE ver TEXT;
+BEGIN
+
+ UPDATE version set version='0.9.4' where vlock=1 and version='0.9.3';
+
+ IF found THEN
+  RETURN;
+ END IF;
+
+ SELECT version into ver from version
+  WHERE vlock=1;
+
+ RAISE EXCEPTION 'Wrong DB version - expect "0.9.3" - found "%"', ver;
+
+END $$;
+
+ALTER TABLE sharesummary DROP CONSTRAINT sharesummary_pkey;
+
+ALTER TABLE sharesummary ADD CONSTRAINT sharesummary_pkey
+ PRIMARY KEY (workinfoid, userid, workername);
+
+END transaction;