diff --git a/setup/env-variables/backend-env-variables.mdx b/setup/env-variables/backend-env-variables.mdx
index 8aef92d..e7de00b 100644
--- a/setup/env-variables/backend-env-variables.mdx
+++ b/setup/env-variables/backend-env-variables.mdx
@@ -319,6 +319,8 @@ Can be set in format `1h` for 1 hour, `1m` for 1 minute, `1s` or `1` for 1 secon
| `MIGRATION_RECOVERY_WETH_TOKEN_TRANSFERS_BLOCKS_BATCH_SIZE` | Specifies the block range size selected for the recovery of WETH token transfer migration. Implemented in [#12065](https://github.com/blockscout/blockscout/pull/12065). | Version: v8.0.0\+
Default: `100000`
Applications: Indexer |
| `MIGRATION_RECOVERY_WETH_TOKEN_TRANSFERS_HIGH_VERBOSITY` | If set to `true`, enables high verbosity logging (logs each transaction hash, where missed transfers were restored) during the recovery of WETH token transfer migration. Implemented in [#12065](https://github.com/blockscout/blockscout/pull/12065). | Version: v8.0.0\+
Default: `true`
Applications: Indexer |
| `MIGRATION_MERGE_ADJACENT_MISSING_BLOCK_RANGES_BATCH_SIZE` | Specifies the missing block range batch size selected for the merge migration. Implemented in [#12778](https://github.com/blockscout/blockscout/pull/12778). | Version: v9.0.0\+
Default: `100`
Applications: Indexer |
+| `MIGRATION_BACKFILL_CALL_TYPE_ENUM_CONCURRENCY` | Specifies the concurrency for the `call_type_enum` filling migration. Implemented in [#13184](https://github.com/blockscout/blockscout/pull/13184). | Version: master\+
Default: `1`
Applications: Indexer |
+| `MIGRATION_BACKFILL_CALL_TYPE_ENUM_BATCH_SIZE` | Specifies the batch size for the `call_type_enum` filling migration. Implemented in [#13184](https://github.com/blockscout/blockscout/pull/13184). | Version: master\+
Default: `100`
Applications: Indexer |
## Market