diff --git a/spec/transactional.json b/spec/transactional.json
index 7e2cf3c..68517ba 100644
--- a/spec/transactional.json
+++ b/spec/transactional.json
@@ -2835,7 +2835,7 @@
                   "properties": {
                     "sms": {
                       "type": "object",
-                      "required": ["text", "to", "consent", "track_clicks", "from"],
+                      "required": ["text", "to", "consent", "from"],
                       "properties": {
                         "text": {
                           "type": "string",
@@ -2857,10 +2857,6 @@
                         "track_clicks": {
                           "type": "boolean",
                           "description": "whether or not to turn on click tracking for the message"
-                        },
-                        "from_number": {
-                          "type": "string",
-                          "description": "optional phone number to send the SMS from. If not provided, uses the default SMS program's messaging number"
                         }
                       }
                     }
@@ -2885,6 +2881,11 @@
                     "description": "the phone number of the recipient",
                     "example": "+10000000000"
                   },
+                  "from": {
+                    "type": "string",
+                    "description": "the phone number of the sender",
+                    "example": "+10000000000"
+                  },
                   "status": {
                     "type": "string",
                     "description": "the sending status of the message",
diff --git a/spec/transactional.openapi.json b/spec/transactional.openapi.json
index 04a51d1..fd82086 100644
--- a/spec/transactional.openapi.json
+++ b/spec/transactional.openapi.json
@@ -10891,6 +10891,7 @@
                                         "required": [
                                             "text",
                                             "to",
+                                            "from",
                                             "consent"
                                         ],
                                         "properties": {
@@ -10905,10 +10906,9 @@
                                                 "pattern": "^\\+[1-9]\\d{1,14}$",
                                                 "example": "+10000000000"
                                             },
-                                            "from_number": {
+                                            "from": {
                                                 "description": "The phone number to send the SMS from.",
                                                 "type": "string",
-                                                "pattern": "^\\+[1-9]\\d{1,14}$",
                                                 "example": "+10000000000"
                                             },
                                             "consent": {
@@ -11134,6 +11134,7 @@
                 "description": "The sending results for a single SMS recipient",
                 "required": [
                     "to",
+                    "from",
                     "status",
                     "_id"
                 ],
@@ -11144,6 +11145,11 @@
                         "pattern": "^\\+[1-9]\\d{1,14}$",
                         "example": "+10000000000"
                     },
+                    "from": {
+                        "description": "The phone number of the sender",
+                        "type": "string",
+                        "example": "+10000000000"
+                    },
                     "status": {
                         "description": "The sending status of the recipient",
                         "enum": [