diff --git a/bambulabs/src/message.rs b/bambulabs/src/message.rs
index db1d239..551ab4c 100644
--- a/bambulabs/src/message.rs
+++ b/bambulabs/src/message.rs
@@ -200,6 +200,8 @@ pub enum Result {
 pub enum Print {
     /// Ams control.
     AmsControl(AmsControl),
+    /// Ams change filament.
+    AmsChangeFilament(AmsChangeFilament),
     /// Calibration.
     Calibration(Calibration),
     /// The status of the print.
@@ -223,6 +225,7 @@ impl Print {
     pub fn sequence_id(&self) -> SequenceId {
         match self {
             Print::AmsControl(ams_ctrl) => ams_ctrl.sequence_id.clone(),
+            Print::AmsChangeFilament(ams_change_filament) => ams_change_filament.sequence_id.clone(),
             Print::Calibration(calibration) => calibration.sequence_id.clone(),
             Print::PushStatus(push_status) => push_status.sequence_id.clone(),
             Print::GcodeLine(gcode_line) => gcode_line.sequence_id.clone(),
@@ -250,6 +253,25 @@ pub struct AmsControl {
     other: BTreeMap<String, Value>,
 }
 
+/// An ams change filament.
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
+pub struct AmsChangeFilament {
+    /// The sequence id.
+    pub sequence_id: SequenceId,
+    /// The reason for the message.
+    pub reason: Option<Reason>,
+    /// The result of the command.
+    pub result: Result,
+    /// The error number.
+    pub errorno: i64,
+    /// The target temperature.
+    pub tar_temp: i64,
+    /// The target.
+    pub target: i64,
+    #[serde(flatten)]
+    other: BTreeMap<String, Value>,
+}
+
 /// A calibration command.
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
 pub struct Calibration {
diff --git a/openapi/api.json b/openapi/api.json
index 0daaf88..af4f572 100644
--- a/openapi/api.json
+++ b/openapi/api.json
@@ -618,6 +618,67 @@
             ],
             "type": "object"
           },
+          {
+            "additionalProperties": true,
+            "description": "Ams change filament.",
+            "properties": {
+              "command": {
+                "enum": [
+                  "ams_change_filament"
+                ],
+                "type": "string"
+              },
+              "errorno": {
+                "description": "The error number.",
+                "format": "int64",
+                "type": "integer"
+              },
+              "reason": {
+                "allOf": [
+                  {
+                    "$ref": "#/components/schemas/Reason"
+                  }
+                ],
+                "description": "The reason for the message.",
+                "nullable": true
+              },
+              "result": {
+                "allOf": [
+                  {
+                    "$ref": "#/components/schemas/Result"
+                  }
+                ],
+                "description": "The result of the command."
+              },
+              "sequence_id": {
+                "allOf": [
+                  {
+                    "$ref": "#/components/schemas/SequenceId"
+                  }
+                ],
+                "description": "The sequence id."
+              },
+              "tar_temp": {
+                "description": "The target temperature.",
+                "format": "int64",
+                "type": "integer"
+              },
+              "target": {
+                "description": "The target.",
+                "format": "int64",
+                "type": "integer"
+              }
+            },
+            "required": [
+              "command",
+              "errorno",
+              "result",
+              "sequence_id",
+              "tar_temp",
+              "target"
+            ],
+            "type": "object"
+          },
           {
             "additionalProperties": true,
             "description": "Calibration.",