diff --git a/openapi/api-docs.yaml b/openapi/api-docs.yaml
index 6b7bd39064b4..7e8fb1f123f0 100644
--- a/openapi/api-docs.yaml
+++ b/openapi/api-docs.yaml
@@ -11994,7 +11994,7 @@ paths:
         default:
           $ref: "#/components/responses/default"
   "/api/v1/invoices/{id}/upload":
-    put:
+    post:
       tags:
         - invoices
       summary: "Add invoice document"
@@ -12012,6 +12012,23 @@ paths:
             type: string
             format: string
           example: D2J234DFA
+      requestBody:
+        description: "File Upload Body"
+        required: true
+        content:
+          multipart/form-data:
+            schema:
+              type: object
+              properties:
+                _method:
+                  type: string
+                  example: PUT
+                documents:
+                  type: array
+                  items:
+                    description: "Array of binary documents for upload"
+                    type: string
+                    format: binary
       responses:
         200:
           description: "Returns the Invoice object"
diff --git a/openapi/paths/invoices.yaml b/openapi/paths/invoices.yaml
index e28a1af59321..e9f8d75ef96b 100644
--- a/openapi/paths/invoices.yaml
+++ b/openapi/paths/invoices.yaml
@@ -568,7 +568,7 @@
         default:
           $ref: "#/components/responses/default"
   "/api/v1/invoices/{id}/upload":
-    put:
+    post:
       tags:
         - invoices
       summary: "Add invoice document"
@@ -586,6 +586,23 @@
             type: string
             format: string
           example: D2J234DFA
+      requestBody:
+        description: "File Upload Body"
+        required: true
+        content:
+          multipart/form-data:
+            schema:
+              type: object
+              properties:
+                _method:
+                  type: string
+                  example: PUT
+                documents:
+                  type: array
+                  items:
+                    description: "Array of binary documents for upload"
+                    type: string
+                    format: binary
       responses:
         200:
           description: "Returns the Invoice object"