diff --git a/config-templates/complex-tidb-binlog.yaml b/config-templates/complex-tidb-binlog.yaml
index 345156b17e0a5..6981030e2b69f 100644
--- a/config-templates/complex-tidb-binlog.yaml
+++ b/config-templates/complex-tidb-binlog.yaml
@@ -149,7 +149,7 @@ drainer_servers:
       - db1
       - db2
       syncer.to.kafka-addrs: "10.0.1.20:9092,10.0.1.21:9092,10.0.1.22:9092"
-      syncer.to.kafka-version: "0.10.0.0"
+      syncer.to.kafka-version: "2.4.0"
       syncer.to.topic-name: "asyouwish"
          
 monitoring_servers:
diff --git a/deploy-monitoring-services.md b/deploy-monitoring-services.md
index 19054cbb472d3..0a7ada09ece5a 100644
--- a/deploy-monitoring-services.md
+++ b/deploy-monitoring-services.md
@@ -31,7 +31,7 @@ Assume that the TiDB cluster topology is as follows:
 # Downloads the package.
 wget https://download.pingcap.org/prometheus-2.27.1.linux-amd64.tar.gz
 wget https://download.pingcap.org/node_exporter-v1.3.1-linux-amd64.tar.gz
-wget https://download.pingcap.org/grafana-6.1.6.linux-amd64.tar.gz
+wget https://download.pingcap.org/grafana-7.5.11.linux-amd64.tar.gz
 ```
 
 {{< copyable "shell-regular" >}}
@@ -40,7 +40,7 @@ wget https://download.pingcap.org/grafana-6.1.6.linux-amd64.tar.gz
 # Extracts the package.
 tar -xzf prometheus-2.27.1.linux-amd64.tar.gz
 tar -xzf node_exporter-v1.3.1-linux-amd64.tar.gz
-tar -xzf grafana-6.1.6.linux-amd64.tar.gz
+tar -xzf grafana-7.5.11.linux-amd64.tar.gz
 ```
 
 ### Step 2: Start `node_exporter` on Node1, Node2, Node3, and Node4
@@ -135,7 +135,7 @@ Edit the Grafana configuration file:
 {{< copyable "shell-regular" >}}
 
 ```ini
-cd grafana-6.1.6 &&
+cd grafana-7.5.11 &&
 vi conf/grafana.ini
 
 ...
diff --git a/ticdc/manage-ticdc.md b/ticdc/manage-ticdc.md
index 94a390a9aff78..ae9dd9579e913 100644
--- a/ticdc/manage-ticdc.md
+++ b/ticdc/manage-ticdc.md
@@ -206,7 +206,7 @@ The following are descriptions of parameters and parameter values that can be co
 | `127.0.0.1`          | The IP address of the downstream Kafka services                                 |
 | `9092`               | The port for the downstream Kafka                                          |
 | `topic-name` | Variable. The name of the Kafka topic |
-| `kafka-version`      | The version of the downstream Kafka (optional, `2.4.0` by default. Currently, the earliest supported Kafka version is `0.11.0.2` and the latest one is `2.7.0`. This value needs to be consistent with the actual version of the downstream Kafka)                      |
+| `kafka-version`      | The version of the downstream Kafka (optional, `2.4.0` by default. Currently, the earliest supported Kafka version is `0.11.0.2` and the latest one is `3.1.0`. This value needs to be consistent with the actual version of the downstream Kafka)                      |
 | `kafka-client-id`    | Specifies the Kafka client ID of the replication task (optional. `TiCDC_sarama_producer_replication ID` by default) |
 | `partition-num`      | The number of the downstream Kafka partitions (optional. The value must be **no greater than** the actual number of partitions; otherwise, the replication task cannot be created successfully. `3` by default) |
 | `max-message-bytes`  | The maximum size of data that is sent to Kafka broker each time (optional, `10MB` by default). From v5.0.6 and v4.0.6, the default value has changed from 64MB and 256MB to 10MB. |
diff --git a/ticdc/ticdc-canal-json.md b/ticdc/ticdc-canal-json.md
index 5c5388d1c70ce..1bb9a5db69a1a 100644
--- a/ticdc/ticdc-canal-json.md
+++ b/ticdc/ticdc-canal-json.md
@@ -22,7 +22,7 @@ The following is an example of using `Canal-JSON`:
 {{< copyable "shell-regular" >}}
 
 ```shell
-cdc cli changefeed create --pd=http://127.0.0.1:2379 --changefeed-id="kafka-canal-json" --sink-uri="kafka://127.0.0.1:9092/topic-name?kafka-version=2.6.0&protocol=canal-json"
+cdc cli changefeed create --pd=http://127.0.0.1:2379 --changefeed-id="kafka-canal-json" --sink-uri="kafka://127.0.0.1:9092/topic-name?kafka-version=2.4.0&protocol=canal-json"
 ```
 
 ## TiDB extension field
@@ -37,7 +37,7 @@ The following is an example:
 {{< copyable "shell-regular" >}}
 
 ```shell
-cdc cli changefeed create --pd=http://127.0.0.1:2379 --changefeed-id="kafka-canal-json-enable-tidb-extension" --sink-uri="kafka://127.0.0.1:9092/topic-name?kafka-version=2.6.0&protocol=canal-json&enable-tidb-extension=true"
+cdc cli changefeed create --pd=http://127.0.0.1:2379 --changefeed-id="kafka-canal-json-enable-tidb-extension" --sink-uri="kafka://127.0.0.1:9092/topic-name?kafka-version=2.4.0&protocol=canal-json&enable-tidb-extension=true"
 ```
 
 ## Definitions of message formats
diff --git a/tidb-binlog/binlog-consumer-client.md b/tidb-binlog/binlog-consumer-client.md
index 37f1914e3f9d5..55c0e19b020f0 100644
--- a/tidb-binlog/binlog-consumer-client.md
+++ b/tidb-binlog/binlog-consumer-client.md
@@ -20,7 +20,7 @@ db-type = "kafka"
 # the Kafka address
 kafka-addrs = "127.0.0.1:9092"
 # the Kafka version
-kafka-version = "0.8.2.0"
+kafka-version = "2.4.0"
 ```
 
 ## Customized development