diff --git a/sql/branch.sql b/sql/branch.sql
deleted file mode 100644
index 7616804cb..000000000
--- a/sql/branch.sql
+++ /dev/null
@@ -1 +0,0 @@
-ALTER TABLE user_secrets ADD COLUMN latest_use date;
diff --git a/sql/migrations.sql b/sql/migrations.sql
index acb515e89..4f33038a6 100644
--- a/sql/migrations.sql
+++ b/sql/migrations.sql
@@ -3491,3 +3491,6 @@ CREATE INDEX public_name_trgm_idx ON participants
 
 -- migration #178
 UPDATE exchange_routes SET is_default_for = 'EUR', is_default = null WHERE network = 'stripe-sdd' AND is_default;
+
+-- migration #179
+ALTER TABLE user_secrets ADD COLUMN latest_use date;
diff --git a/sql/schema.sql b/sql/schema.sql
index f4533812d..0ca7b95e0 100644
--- a/sql/schema.sql
+++ b/sql/schema.sql
@@ -14,7 +14,7 @@ COMMENT ON EXTENSION pg_stat_statements IS 'track execution statistics of all SQ
 
 -- database metadata
 CREATE TABLE db_meta (key text PRIMARY KEY, value jsonb);
-INSERT INTO db_meta (key, value) VALUES ('schema_version', '178'::jsonb);
+INSERT INTO db_meta (key, value) VALUES ('schema_version', '179'::jsonb);
 
 
 -- app configuration
@@ -1100,6 +1100,7 @@ CREATE TABLE user_secrets
 , id            int           NOT NULL
 , secret        text          NOT NULL
 , mtime         timestamptz   NOT NULL DEFAULT current_timestamp
+, latest_use    date
 , UNIQUE (participant, id)
 );