diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6ad84b96..d95901cf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ The file format of it is based on [Keep a Changelog](http://keepachangelog.com/e
 For public Changelog covering all changes done to Pipedrive’s API, webhooks and app extensions platforms, see [public Changelog](https://pipedrive.readme.io/docs/changelog) with discussion area in [Developers Community](https://devcommunity.pipedrive.com/c/documentation/changelog/19).
 
 ## [Unreleased]
+### Changed
+- Changed `board_id` and `phase_id` to be optional in `POST /api/v1/projects`
 
 ## [31.5.0] - 2026-03-04
 ### Added
diff --git a/src/versions/v1/models/project-all-of.ts b/src/versions/v1/models/project-all-of.ts
index 7a582fb2..27296109 100644
--- a/src/versions/v1/models/project-all-of.ts
+++ b/src/versions/v1/models/project-all-of.ts
@@ -25,15 +25,5 @@ export interface ProjectAllOf {
     * @type {string}
     */
     'title'?: string;
-    /**
-    * The ID of the board this project is associated with
-    * @type {number}
-    */
-    'board_id'?: number;
-    /**
-    * The ID of the phase this project is associated with
-    * @type {number}
-    */
-    'phase_id'?: number;
 }
 
diff --git a/src/versions/v1/models/project-all-of1.ts b/src/versions/v1/models/project-all-of1.ts
index b050776e..9c3384d9 100644
--- a/src/versions/v1/models/project-all-of1.ts
+++ b/src/versions/v1/models/project-all-of1.ts
@@ -20,6 +20,16 @@
 * @interface ProjectAllOf1
 */
 export interface ProjectAllOf1 {
+    /**
+    * The ID of the board this project is associated with
+    * @type {number}
+    */
+    'board_id'?: number;
+    /**
+    * The ID of the phase this project is associated with
+    * @type {number}
+    */
+    'phase_id'?: number;
     /**
     * The description of the project
     * @type {string}
diff --git a/src/versions/v1/models/required-post-project-parameters.ts b/src/versions/v1/models/required-post-project-parameters.ts
index 2ffcbcda..8c502a77 100644
--- a/src/versions/v1/models/required-post-project-parameters.ts
+++ b/src/versions/v1/models/required-post-project-parameters.ts
@@ -25,15 +25,5 @@ export interface RequiredPostProjectParameters {
     * @type {string}
     */
     'title': string;
-    /**
-    * The ID of a project board
-    * @type {number}
-    */
-    'board_id': number;
-    /**
-    * The ID of a phase on a project board
-    * @type {number}
-    */
-    'phase_id': number;
 }