diff --git a/docs/src/changelog.rst.txt b/docs/src/changelog.rst.txt
index bad4fb0..59de5e9 100644
--- a/docs/src/changelog.rst.txt
+++ b/docs/src/changelog.rst.txt
@@ -225,6 +225,9 @@ Changelog
    * - ``29.0.0``
      - 26/06/24
      - Added ``overwrite`` to :carta:ref:`SaveFile` and :carta:ref:`ExportRegion` messages.
+   * - ``29.1.0``
+     - 27/08/24
+     - Added ``rest_freq`` to :carta:ref:`MomentRequest` message.
 
 Versioning
 ----------
diff --git a/docs/src/index.rst b/docs/src/index.rst
index 3c4df6b..736ef20 100644
--- a/docs/src/index.rst
+++ b/docs/src/index.rst
@@ -1,9 +1,9 @@
 CARTA Interface Control Document
 ================================
 
-:Date: 11 June 2024
+:Date: 27 August 2024
 :Authors: Angus Comrie, Rob Simmonds and the CARTA development team
-:Version: 29.0.0
+:Version: 29.1.0
 :ICD Version Integer: 29
 :CARTA Target: Version 5.0
 
diff --git a/docs/src/messages.rst.txt b/docs/src/messages.rst.txt
index 1be9a71..79a1b16 100644
--- a/docs/src/messages.rst.txt
+++ b/docs/src/messages.rst.txt
@@ -1247,6 +1247,10 @@ Source file: `request/moment_request.proto <https://github.com/CARTAvis/carta-pr
      - bool
      - 
      - 
+   * - rest_freq
+     - double
+     - 
+     - Set the rest frequency (Hz) of the image
 
 .. carta:class:: carta-b2f momentresponse
 
diff --git a/request/moment_request.proto b/request/moment_request.proto
index 5905b51..5869d9a 100644
--- a/request/moment_request.proto
+++ b/request/moment_request.proto
@@ -14,6 +14,8 @@ message MomentRequest {
     MomentMask mask = 6;
     FloatBounds pixel_range = 7;
     bool keep = 8;
+    // Set the rest frequency (Hz) of the image
+    double rest_freq = 9;
 }
 
 message MomentResponse {