diff --git a/migrations/cassandra/keyspaces/sis_api/07_add_deployment_and_gpu_spec_id.up.sql b/migrations/cassandra/keyspaces/sis_api/07_add_deployment_and_gpu_spec_id.up.sql
new file mode 100644
index 000000000..d2f8d2d04
--- /dev/null
+++ b/migrations/cassandra/keyspaces/sis_api/07_add_deployment_and_gpu_spec_id.up.sql
@@ -0,0 +1,2 @@
+-- Add deployment_id and gpu_specification_id UUID to instances table
+ALTER TABLE sis_api.instances ADD IF NOT EXISTS (deployment_id uuid, gpu_specification_id uuid);
diff --git a/migrations/cassandra/keyspaces/sis_api/08_add_indexes_for_deployment_and_gpu_spec_id.up.sql b/migrations/cassandra/keyspaces/sis_api/08_add_indexes_for_deployment_and_gpu_spec_id.up.sql
new file mode 100644
index 000000000..de8af0bd2
--- /dev/null
+++ b/migrations/cassandra/keyspaces/sis_api/08_add_indexes_for_deployment_and_gpu_spec_id.up.sql
@@ -0,0 +1,3 @@
+-- Indexes for deployment_id and gpu_specification_id
+CREATE CUSTOM INDEX IF NOT EXISTS idx_instances_by_deployment_id ON sis_api.instances (deployment_id) USING 'StorageAttachedIndex';
+CREATE CUSTOM INDEX IF NOT EXISTS idx_instances_by_gpu_specification_id ON sis_api.instances (gpu_specification_id) USING 'StorageAttachedIndex';