diff --git a/bots/api/TYPES.md b/bots/api/TYPES.md
index 665dd26889..9008e6065a 100644
--- a/bots/api/TYPES.md
+++ b/bots/api/TYPES.md
@@ -2197,6 +2197,10 @@ Secret:
 Small:
 - type: "small"
 
+Header:
+- type: "header"
+- level: int
+
 Colored:
 - type: "colored"
 - color: [Color](#color)
diff --git a/packages/simplex-chat-client/types/typescript/src/types.ts b/packages/simplex-chat-client/types/typescript/src/types.ts
index cae52090e7..235876f129 100644
--- a/packages/simplex-chat-client/types/typescript/src/types.ts
+++ b/packages/simplex-chat-client/types/typescript/src/types.ts
@@ -2466,6 +2466,7 @@ export type Format =
   | Format.Snippet
   | Format.Secret
   | Format.Small
+  | Format.Header
   | Format.Colored
   | Format.Uri
   | Format.HyperLink
@@ -2484,6 +2485,7 @@ export namespace Format {
     | "snippet"
     | "secret"
     | "small"
+    | "header"
     | "colored"
     | "uri"
     | "hyperLink"
@@ -2522,6 +2524,11 @@ export namespace Format {
     type: "small"
   }
 
+  export interface Header extends Interface {
+    type: "header"
+    level: number // int
+  }
+
   export interface Colored extends Interface {
     type: "colored"
     color: Color
diff --git a/packages/simplex-chat-python/src/simplex_chat/types/_types.py b/packages/simplex-chat-python/src/simplex_chat/types/_types.py
index 512a7464db..20946c34ad 100644
--- a/packages/simplex-chat-python/src/simplex_chat/types/_types.py
+++ b/packages/simplex-chat-python/src/simplex_chat/types/_types.py
@@ -1747,6 +1747,10 @@ class Format_secret(TypedDict):
 class Format_small(TypedDict):
     type: Literal["small"]
 
+class Format_header(TypedDict):
+    type: Literal["header"]
+    level: int  # int
+
 class Format_colored(TypedDict):
     type: Literal["colored"]
     color: "Color"
@@ -1791,6 +1795,7 @@ Format = (
     | Format_snippet
     | Format_secret
     | Format_small
+    | Format_header
     | Format_colored
     | Format_uri
     | Format_hyperLink
@@ -1802,7 +1807,7 @@ Format = (
     | Format_phone
 )
 
-Format_Tag = Literal["bold", "italic", "strikeThrough", "snippet", "secret", "small", "colored", "uri", "hyperLink", "simplexLink", "simplexName", "command", "mention", "email", "phone"]
+Format_Tag = Literal["bold", "italic", "strikeThrough", "snippet", "secret", "small", "header", "colored", "uri", "hyperLink", "simplexLink", "simplexName", "command", "mention", "email", "phone"]
 
 class FormattedText(TypedDict):
     format: NotRequired["Format"]