diff --git a/docker/datanode/README.md b/docker/datanode/README.md
index c42fed6..2a13ac3 100644
--- a/docker/datanode/README.md
+++ b/docker/datanode/README.md
@@ -52,13 +52,13 @@ Enable `hostname: "datanode"` in `docker-compose.yml` and `datanode` as an alias
 
 ### Environment Variables
 
-| Variable | Default | Required | Description                                               |
+| Variable | Default | Required | Description |
 | :--- | :--- | :--- |:----------------------------------------------------------|
-| `GRAYLOG_DATANODE_PASSWORD_SECRET` | none | yes | Password secret to seed secret storage.                   |
-| `GRAYLOG_DATANODE_ROOT_PASSWORD_SHA2` | none | yes | Password hash for the root user.                          |
-| `GRAYLOG_DATANODE_ROOT_USERNAME` | admin | yes |name of the root user.                          |
-| `GRAYLOG_DATANODE_MONGODB_URI` | none | yes | URI to the MongoDB instance and database.                 |
-| `GRAYLOG_DATANODE_DATA_DIR` | `/var/lib/graylog-datanode` | no | The data root directory. (e.g., OpenSearch data)          |
-| `GRAYLOG_DATANODE_NODE_NAME` | container hostname | no | The OpenSearch node name.                                 |
+| `GRAYLOG_DATANODE_PASSWORD_SECRET` | none | yes | Password secret to seed secret storage. |
+| `GRAYLOG_DATANODE_ROOT_PASSWORD_SHA2` | none | yes | Password hash for the root user. |
+| `GRAYLOG_DATANODE_ROOT_USERNAME` | admin | yes |name of the root user. |
+| `GRAYLOG_DATANODE_MONGODB_URI` | none | yes | URI to the MongoDB instance and database. |
+| `GRAYLOG_DATANODE_DATA_DIR` | `/var/lib/graylog-datanode` | no | The data root directory. (e.g., OpenSearch data) |
+| `GRAYLOG_DATANODE_NODE_NAME` | container hostname | no | The OpenSearch node name. |
 | `GRAYLOG_DATANODE_SINGLE_NODE_ONLY` | `"false"` | no | Starts OpenSearch in single node mode when set to `true`. |
 | `GRAYLOG_DATANODE_OPENSEARCH_DISCOVERY_SEED_HOSTS` | none | no | tbd |