diff --git a/docs/reference/index.html b/docs/reference/index.html
index 03a1800e4..0245eb5ff 100644
--- a/docs/reference/index.html
+++ b/docs/reference/index.html
@@ -2210,7 +2210,8 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         kwargs.update(
             {&#34;channel_id&#34;: channel_id, &#34;thread_ts&#34;: thread_ts, &#34;status&#34;: status, &#34;loading_messages&#34;: loading_messages}
         )
-        return self.api_call(&#34;assistant.threads.setStatus&#34;, params=kwargs)
+        kwargs = _remove_none_values(kwargs)
+        return self.api_call(&#34;assistant.threads.setStatus&#34;, json=kwargs)
 
     def assistant_threads_setTitle(
         self,
@@ -8991,7 +8992,8 @@ <h3>Methods</h3>
     kwargs.update(
         {&#34;channel_id&#34;: channel_id, &#34;thread_ts&#34;: thread_ts, &#34;status&#34;: status, &#34;loading_messages&#34;: loading_messages}
     )
-    return self.api_call(&#34;assistant.threads.setStatus&#34;, params=kwargs)</code></pre>
+    kwargs = _remove_none_values(kwargs)
+    return self.api_call(&#34;assistant.threads.setStatus&#34;, json=kwargs)</code></pre>
 </details>
 <div class="desc"><p>Set the status for an AI assistant thread.
 <a href="https://api.slack.com/methods/assistant.threads.setStatus">https://api.slack.com/methods/assistant.threads.setStatus</a></p></div>
diff --git a/docs/reference/web/async_client.html b/docs/reference/web/async_client.html
index a75296b83..9d895fea8 100644
--- a/docs/reference/web/async_client.html
+++ b/docs/reference/web/async_client.html
@@ -2106,7 +2106,8 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         kwargs.update(
             {&#34;channel_id&#34;: channel_id, &#34;thread_ts&#34;: thread_ts, &#34;status&#34;: status, &#34;loading_messages&#34;: loading_messages}
         )
-        return await self.api_call(&#34;assistant.threads.setStatus&#34;, params=kwargs)
+        kwargs = _remove_none_values(kwargs)
+        return await self.api_call(&#34;assistant.threads.setStatus&#34;, json=kwargs)
 
     async def assistant_threads_setTitle(
         self,
@@ -8887,7 +8888,8 @@ <h3>Methods</h3>
     kwargs.update(
         {&#34;channel_id&#34;: channel_id, &#34;thread_ts&#34;: thread_ts, &#34;status&#34;: status, &#34;loading_messages&#34;: loading_messages}
     )
-    return await self.api_call(&#34;assistant.threads.setStatus&#34;, params=kwargs)</code></pre>
+    kwargs = _remove_none_values(kwargs)
+    return await self.api_call(&#34;assistant.threads.setStatus&#34;, json=kwargs)</code></pre>
 </details>
 <div class="desc"><p>Set the status for an AI assistant thread.
 <a href="https://api.slack.com/methods/assistant.threads.setStatus">https://api.slack.com/methods/assistant.threads.setStatus</a></p></div>
diff --git a/docs/reference/web/client.html b/docs/reference/web/client.html
index b2d44f9ee..e6704424c 100644
--- a/docs/reference/web/client.html
+++ b/docs/reference/web/client.html
@@ -2106,7 +2106,8 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         kwargs.update(
             {&#34;channel_id&#34;: channel_id, &#34;thread_ts&#34;: thread_ts, &#34;status&#34;: status, &#34;loading_messages&#34;: loading_messages}
         )
-        return self.api_call(&#34;assistant.threads.setStatus&#34;, params=kwargs)
+        kwargs = _remove_none_values(kwargs)
+        return self.api_call(&#34;assistant.threads.setStatus&#34;, json=kwargs)
 
     def assistant_threads_setTitle(
         self,
@@ -8887,7 +8888,8 @@ <h3>Methods</h3>
     kwargs.update(
         {&#34;channel_id&#34;: channel_id, &#34;thread_ts&#34;: thread_ts, &#34;status&#34;: status, &#34;loading_messages&#34;: loading_messages}
     )
-    return self.api_call(&#34;assistant.threads.setStatus&#34;, params=kwargs)</code></pre>
+    kwargs = _remove_none_values(kwargs)
+    return self.api_call(&#34;assistant.threads.setStatus&#34;, json=kwargs)</code></pre>
 </details>
 <div class="desc"><p>Set the status for an AI assistant thread.
 <a href="https://api.slack.com/methods/assistant.threads.setStatus">https://api.slack.com/methods/assistant.threads.setStatus</a></p></div>
diff --git a/docs/reference/web/index.html b/docs/reference/web/index.html
index 17315ee92..2e9c01af9 100644
--- a/docs/reference/web/index.html
+++ b/docs/reference/web/index.html
@@ -2467,7 +2467,8 @@ <h2 id="raises">Raises</h2>
         kwargs.update(
             {&#34;channel_id&#34;: channel_id, &#34;thread_ts&#34;: thread_ts, &#34;status&#34;: status, &#34;loading_messages&#34;: loading_messages}
         )
-        return self.api_call(&#34;assistant.threads.setStatus&#34;, params=kwargs)
+        kwargs = _remove_none_values(kwargs)
+        return self.api_call(&#34;assistant.threads.setStatus&#34;, json=kwargs)
 
     def assistant_threads_setTitle(
         self,
@@ -9248,7 +9249,8 @@ <h3>Methods</h3>
     kwargs.update(
         {&#34;channel_id&#34;: channel_id, &#34;thread_ts&#34;: thread_ts, &#34;status&#34;: status, &#34;loading_messages&#34;: loading_messages}
     )
-    return self.api_call(&#34;assistant.threads.setStatus&#34;, params=kwargs)</code></pre>
+    kwargs = _remove_none_values(kwargs)
+    return self.api_call(&#34;assistant.threads.setStatus&#34;, json=kwargs)</code></pre>
 </details>
 <div class="desc"><p>Set the status for an AI assistant thread.
 <a href="https://api.slack.com/methods/assistant.threads.setStatus">https://api.slack.com/methods/assistant.threads.setStatus</a></p></div>
diff --git a/docs/reference/web/legacy_client.html b/docs/reference/web/legacy_client.html
index ad9ae4b96..1d4ebbed8 100644
--- a/docs/reference/web/legacy_client.html
+++ b/docs/reference/web/legacy_client.html
@@ -2105,7 +2105,8 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         kwargs.update(
             {&#34;channel_id&#34;: channel_id, &#34;thread_ts&#34;: thread_ts, &#34;status&#34;: status, &#34;loading_messages&#34;: loading_messages}
         )
-        return self.api_call(&#34;assistant.threads.setStatus&#34;, params=kwargs)
+        kwargs = _remove_none_values(kwargs)
+        return self.api_call(&#34;assistant.threads.setStatus&#34;, json=kwargs)
 
     def assistant_threads_setTitle(
         self,
@@ -8886,7 +8887,8 @@ <h3>Methods</h3>
     kwargs.update(
         {&#34;channel_id&#34;: channel_id, &#34;thread_ts&#34;: thread_ts, &#34;status&#34;: status, &#34;loading_messages&#34;: loading_messages}
     )
-    return self.api_call(&#34;assistant.threads.setStatus&#34;, params=kwargs)</code></pre>
+    kwargs = _remove_none_values(kwargs)
+    return self.api_call(&#34;assistant.threads.setStatus&#34;, json=kwargs)</code></pre>
 </details>
 <div class="desc"><p>Set the status for an AI assistant thread.
 <a href="https://api.slack.com/methods/assistant.threads.setStatus">https://api.slack.com/methods/assistant.threads.setStatus</a></p></div>
diff --git a/slack_sdk/web/async_client.py b/slack_sdk/web/async_client.py
index 5b4a474ac..3f30bad5a 100644
--- a/slack_sdk/web/async_client.py
+++ b/slack_sdk/web/async_client.py
@@ -2084,7 +2084,8 @@ async def assistant_threads_setStatus(
         kwargs.update(
             {"channel_id": channel_id, "thread_ts": thread_ts, "status": status, "loading_messages": loading_messages}
         )
-        return await self.api_call("assistant.threads.setStatus", params=kwargs)
+        kwargs = _remove_none_values(kwargs)
+        return await self.api_call("assistant.threads.setStatus", json=kwargs)
 
     async def assistant_threads_setTitle(
         self,
diff --git a/slack_sdk/web/client.py b/slack_sdk/web/client.py
index fa9683b13..8c15f983f 100644
--- a/slack_sdk/web/client.py
+++ b/slack_sdk/web/client.py
@@ -2074,7 +2074,8 @@ def assistant_threads_setStatus(
         kwargs.update(
             {"channel_id": channel_id, "thread_ts": thread_ts, "status": status, "loading_messages": loading_messages}
         )
-        return self.api_call("assistant.threads.setStatus", params=kwargs)
+        kwargs = _remove_none_values(kwargs)
+        return self.api_call("assistant.threads.setStatus", json=kwargs)
 
     def assistant_threads_setTitle(
         self,
diff --git a/slack_sdk/web/legacy_client.py b/slack_sdk/web/legacy_client.py
index 558598806..29ef99064 100644
--- a/slack_sdk/web/legacy_client.py
+++ b/slack_sdk/web/legacy_client.py
@@ -2086,7 +2086,8 @@ def assistant_threads_setStatus(
         kwargs.update(
             {"channel_id": channel_id, "thread_ts": thread_ts, "status": status, "loading_messages": loading_messages}
         )
-        return self.api_call("assistant.threads.setStatus", params=kwargs)
+        kwargs = _remove_none_values(kwargs)
+        return self.api_call("assistant.threads.setStatus", json=kwargs)
 
     def assistant_threads_setTitle(
         self,
diff --git a/tests/slack_sdk_async/web/test_web_client_coverage.py b/tests/slack_sdk_async/web/test_web_client_coverage.py
index 998c0bb3e..af6d92236 100644
--- a/tests/slack_sdk_async/web/test_web_client_coverage.py
+++ b/tests/slack_sdk_async/web/test_web_client_coverage.py
@@ -425,7 +425,19 @@ async def run_method(self, method_name, method, async_method):
                 self.api_methods_to_call.remove(
                     method(channel_id="D111", thread_ts="111.222", status="is typing...")["method"]
                 )
+                method(
+                    channel_id="D111",
+                    thread_ts="111.222",
+                    status="is typing...",
+                    loading_states=["Thinking...", "Writing..."],
+                )
                 await async_method(channel_id="D111", thread_ts="111.222", status="is typing...")
+                await async_method(
+                    channel_id="D111",
+                    thread_ts="111.222",
+                    status="is typing...",
+                    loading_states=["Thinking...", "Writing..."],
+                )
             elif method_name == "assistant_threads_setTitle":
                 self.api_methods_to_call.remove(method(channel_id="D111", thread_ts="111.222", title="New chat")["method"])
                 await async_method(channel_id="D111", thread_ts="111.222", title="New chat")