diff --git a/docs/syntax/sequenceDiagram.md b/docs/syntax/sequenceDiagram.md
index 7557fef67..eb2f7ad23 100644
--- a/docs/syntax/sequenceDiagram.md
+++ b/docs/syntax/sequenceDiagram.md
@@ -740,21 +740,22 @@ Styling of a sequence diagram is done by defining a number of css classes. Durin
 
 ### Classes used
 
-| Class        | Description                                                 |
-| ------------ | ----------------------------------------------------------- |
-| actor        | Styles for the actor box.                                   |
-| actor-top    | Styles for the actor figure/ box at the top of the diagram. |
-| text.actor   | Styles for text in the actor box.                           |
-| actor-line   | The vertical line for an actor.                             |
-| messageLine0 | Styles for the solid message line.                          |
-| messageLine1 | Styles for the dotted message line.                         |
-| messageText  | Defines styles for the text on the message arrows.          |
-| labelBox     | Defines styles label to left in a loop.                     |
-| labelText    | Styles for the text in label for loops.                     |
-| loopText     | Styles for the text in the loop box.                        |
-| loopLine     | Defines styles for the lines in the loop box.               |
-| note         | Styles for the note box.                                    |
-| noteText     | Styles for the text on in the note boxes.                   |
+| Class        | Description                                                    |
+| ------------ | -------------------------------------------------------------- |
+| actor        | Styles for the actor box.                                      |
+| actor-top    | Styles for the actor figure/ box at the top of the diagram.    |
+| actor-bottom | Styles for the actor figure/ box at the bottom of the diagram. |
+| text.actor   | Styles for text in the actor box.                              |
+| actor-line   | The vertical line for an actor.                                |
+| messageLine0 | Styles for the solid message line.                             |
+| messageLine1 | Styles for the dotted message line.                            |
+| messageText  | Defines styles for the text on the message arrows.             |
+| labelBox     | Defines styles label to left in a loop.                        |
+| labelText    | Styles for the text in label for loops.                        |
+| loopText     | Styles for the text in the loop box.                           |
+| loopLine     | Defines styles for the lines in the loop box.                  |
+| note         | Styles for the note box.                                       |
+| noteText     | Styles for the text on in the note boxes.                      |
 
 ### Sample stylesheet
 
diff --git a/packages/mermaid/src/docs/syntax/sequenceDiagram.md b/packages/mermaid/src/docs/syntax/sequenceDiagram.md
index ed3690620..091e8b783 100644
--- a/packages/mermaid/src/docs/syntax/sequenceDiagram.md
+++ b/packages/mermaid/src/docs/syntax/sequenceDiagram.md
@@ -518,21 +518,22 @@ Styling of a sequence diagram is done by defining a number of css classes. Durin
 
 ### Classes used
 
-| Class        | Description                                                 |
-| ------------ | ----------------------------------------------------------- |
-| actor        | Styles for the actor box.                                   |
-| actor-top    | Styles for the actor figure/ box at the top of the diagram. |
-| text.actor   | Styles for text in the actor box.                           |
-| actor-line   | The vertical line for an actor.                             |
-| messageLine0 | Styles for the solid message line.                          |
-| messageLine1 | Styles for the dotted message line.                         |
-| messageText  | Defines styles for the text on the message arrows.          |
-| labelBox     | Defines styles label to left in a loop.                     |
-| labelText    | Styles for the text in label for loops.                     |
-| loopText     | Styles for the text in the loop box.                        |
-| loopLine     | Defines styles for the lines in the loop box.               |
-| note         | Styles for the note box.                                    |
-| noteText     | Styles for the text on in the note boxes.                   |
+| Class        | Description                                                    |
+| ------------ | -------------------------------------------------------------- |
+| actor        | Styles for the actor box.                                      |
+| actor-top    | Styles for the actor figure/ box at the top of the diagram.    |
+| actor-bottom | Styles for the actor figure/ box at the bottom of the diagram. |
+| text.actor   | Styles for text in the actor box.                              |
+| actor-line   | The vertical line for an actor.                                |
+| messageLine0 | Styles for the solid message line.                             |
+| messageLine1 | Styles for the dotted message line.                            |
+| messageText  | Defines styles for the text on the message arrows.             |
+| labelBox     | Defines styles label to left in a loop.                        |
+| labelText    | Styles for the text in label for loops.                        |
+| loopText     | Styles for the text in the loop box.                           |
+| loopLine     | Defines styles for the lines in the loop box.                  |
+| note         | Styles for the note box.                                       |
+| noteText     | Styles for the text on in the note boxes.                      |
 
 ### Sample stylesheet