diff --git a/methods/chat/chat.postEphemeral.json b/methods/chat/chat.postEphemeral.json
index 539d8d2e..c2ae3a89 100644
--- a/methods/chat/chat.postEphemeral.json
+++ b/methods/chat/chat.postEphemeral.json
@@ -151,6 +151,7 @@
         "markdown_text"
       ],
       "desc": "Use either text or markdown_text, but not both.",
+      "required": false,
       "mutually_exclusive": true
     }
   ]
diff --git a/methods/chat/chat.postMessage.json b/methods/chat/chat.postMessage.json
index 674dddf5..6039a4f9 100644
--- a/methods/chat/chat.postMessage.json
+++ b/methods/chat/chat.postMessage.json
@@ -207,6 +207,7 @@
         "markdown_text"
       ],
       "desc": "Use either text or markdown_text, but not both.",
+      "required": false,
       "mutually_exclusive": true
     }
   ]
diff --git a/methods/chat/chat.scheduleMessage.json b/methods/chat/chat.scheduleMessage.json
index bcf55679..6c4381e2 100644
--- a/methods/chat/chat.scheduleMessage.json
+++ b/methods/chat/chat.scheduleMessage.json
@@ -168,6 +168,7 @@
         "markdown_text"
       ],
       "desc": "Use either text or markdown_text, but not both.",
+      "required": false,
       "mutually_exclusive": true
     }
   ]
diff --git a/methods/chat/chat.update.json b/methods/chat/chat.update.json
index 38f49091..b4d8089c 100644
--- a/methods/chat/chat.update.json
+++ b/methods/chat/chat.update.json
@@ -183,6 +183,7 @@
         "markdown_text"
       ],
       "desc": "Use either text or markdown_text, but not both.",
+      "required": false,
       "mutually_exclusive": true
     }
   ]