diff --git a/deploy/docker-compose.yml b/deploy/docker-compose.yml
index 3ced54a..3f788d4 100644
--- a/deploy/docker-compose.yml
+++ b/deploy/docker-compose.yml
@@ -32,6 +32,7 @@ services:
     volumes:
       - db-data:/var/lib/postgresql/data
       - ./init.sql:/docker-entrypoint-initdb.d/init.sql:ro
+      - ./migrate.sh:/docker-entrypoint-initdb.d/migrate.sh:ro
       - ./zz-set-passwords.sh:/docker-entrypoint-initdb.d/zz-set-passwords.sh:ro
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U postgres"]
diff --git a/deploy/migrate.sh b/deploy/migrate.sh
new file mode 100644
index 0000000..3982294
--- /dev/null
+++ b/deploy/migrate.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+# Override the default Supabase migrate.sh
+# Our migrations are handled via init.sql which runs as postgres user
+echo "Skipping built-in migrate.sh - migrations handled by init.sql"
+exit 0
diff --git a/docker-compose.yml b/docker-compose.yml
index 6848ad2..a271694 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -21,6 +21,8 @@ services:
       - db-data:/var/lib/postgresql/data
       # Init script to create schemas (runs first due to 00- prefix)
       - ./supabase/docker/00-init-schemas.sql:/docker-entrypoint-initdb.d/00-init-schemas.sql:ro
+      # Override built-in migrate.sh to prevent supabase_admin auth failures
+      - ./supabase/docker/migrate.sh:/docker-entrypoint-initdb.d/migrate.sh:ro
       # Migrations mounted separately for manual execution
       - ./supabase/migrations:/migrations:ro
     healthcheck:
diff --git a/supabase/docker/migrate.sh b/supabase/docker/migrate.sh
new file mode 100644
index 0000000..3982294
--- /dev/null
+++ b/supabase/docker/migrate.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+# Override the default Supabase migrate.sh
+# Our migrations are handled via init.sql which runs as postgres user
+echo "Skipping built-in migrate.sh - migrations handled by init.sql"
+exit 0