diff --git a/input/syslog.md b/input/syslog.md
index 93ef1c53..716171d6 100644
--- a/input/syslog.md
+++ b/input/syslog.md
@@ -286,6 +286,16 @@ The field name of the client's hostname. If set, the client's hostname will be s
 
 The field name of the client's address. If set, the client's address will be set to its key.
 
+### `include_source_host`
+
+| type | default | version |
+| :--- | :--- | :--- |
+| bool | false | 0.10.53 |
+
+This parameter is deprecated. Use `source_hostname_key` or `source_address_key` instead.
+
+If `true`, adds the source host to the event record.
+
 ### `severity_key`
 
 | type | default | version |
diff --git a/input/tcp.md b/input/tcp.md
index c184720c..41e60ae6 100644
--- a/input/tcp.md
+++ b/input/tcp.md
@@ -133,6 +133,16 @@ You will get something like below:
 }
 ```
 
+### `source_host_key`
+
+| type | default | version |
+| :--- | :--- | :--- |
+| string | nil | 0.10.51 |
+
+This parameter is deprecated. Use `source_hostname_key` instead.
+
+The field name of the client's hostname.
+
 ### `message_length_limit`
 
 | type | default | version |
diff --git a/input/udp.md b/input/udp.md
index 10c61613..fb19b7e1 100644
--- a/input/udp.md
+++ b/input/udp.md
@@ -119,6 +119,16 @@ You will get something like this:
 }
 ```
 
+### `source_host_key`
+
+| type | default | version |
+| :--- | :--- | :--- |
+| string | nil | 0.10.51 |
+
+This parameter is deprecated. Use `source_hostname_key` instead.
+
+The field name of the client's hostname.
+
 ### `message_length_limit`
 
 | type | default | version |
@@ -127,6 +137,16 @@ You will get something like this:
 
 The maximum number of bytes for the message.
 
+### `body_size_limit`
+
+| type | default | version |
+| :--- | :--- | :--- |
+| size | nil | 0.10.51 |
+
+This parameter is deprecated. Use `message_length_limit` instead.
+
+The maximum number of bytes for the message.
+
 ### `remove_newline`
 
 | type | default | version |