Not able to add enum value through Migration script

As the migration scripts used to run in a single transaction , when trying to run the db-migrate:up for pg, getting the below error.
ALTER TYPE ... ADD cannot run inside a transaction block

Query that i am trying to run in script.

ALTER TYPE document_type ADD VALUE 'new value' AFTER 'existing value';
package version i am using in project .
"pg": "^8.5.1",
"db-migrate": "^0.11.11",
"db-migrate-pg": "^1.2.2",

Is there any workaround to skip the transaction for a particular or any suggestions ? It would be very helpful

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