diff --git a/package-lock.json b/package-lock.json
index 2564c51..48f05cb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -396,11 +396,6 @@
       "integrity": "sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==",
       "dev": true
     },
-    "asynckit": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
-      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
-    },
     "ava": {
       "version": "3.9.0",
       "resolved": "https://registry.npmjs.org/ava/-/ava-3.9.0.tgz",
@@ -906,14 +901,6 @@
       "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
       "dev": true
     },
-    "combined-stream": {
-      "version": "1.0.8",
-      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
-      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
-      "requires": {
-        "delayed-stream": "~1.0.0"
-      }
-    },
     "common-path-prefix": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/common-path-prefix/-/common-path-prefix-3.0.0.tgz",
@@ -1206,11 +1193,6 @@
         }
       }
     },
-    "delayed-stream": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
-      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
-    },
     "depd": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
@@ -1793,14 +1775,27 @@
       "integrity": "sha512-zAoAQiudy+r5SvnSw3KJy5os/oRJYHzrzja/tBDqrZtNhUw8bt6y8OBzMWcjWr+8liV8Eb6yOhw8WZ7VFZ5ZzA==",
       "dev": true
     },
-    "form-data": {
-      "version": "2.5.1",
-      "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.5.1.tgz",
-      "integrity": "sha512-m21N3WOmEEURgk6B9GLOE4RuWOFf28Lhh9qGYeNlGq4VDXUlJy2th2slBNU8Gp8EzloYZOibZJ7t5ecIrFSjVA==",
+    "formdata-node": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/formdata-node/-/formdata-node-2.4.0.tgz",
+      "integrity": "sha512-eikLJEYMMtrc8/tRjUOhwJYoxQVb4R3X+Qlj1gv7tDgihpL8HMnsLLhUyjV8Y2iUm03RmpGmn/o4LyzGX396Uw==",
       "requires": {
-        "asynckit": "^0.4.0",
-        "combined-stream": "^1.0.6",
-        "mime-types": "^2.1.12"
+        "mime-types": "2.1.27"
+      },
+      "dependencies": {
+        "mime-db": {
+          "version": "1.44.0",
+          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.44.0.tgz",
+          "integrity": "sha512-/NOTfLrsPBVeH7YtFPgsVWveuL+4SjjYxaQ1xtM1KMFj7HdxlBlxeyNLzhyJVx7r4rZGJAZ/6lkKCitSc/Nmpg=="
+        },
+        "mime-types": {
+          "version": "2.1.27",
+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.27.tgz",
+          "integrity": "sha512-JIhqnCasI9yD+SsmkquHBxTSEuZdQX5BuQnS2Vc7puQQQ+8yiP5AY5uWhpdv4YL4VM5c6iliiYWPgJ/nJQLp7w==",
+          "requires": {
+            "mime-db": "1.44.0"
+          }
+        }
       }
     },
     "forwarded": {
@@ -2466,19 +2461,6 @@
       "integrity": "sha512-KI1+qOZu5DcW6wayYHSzR/tXKCDC5Om4s1z2QJjDULzLcmf3DvzS7oluY4HCTrc+9FiKmWUgeNLg7W3uIQvxtQ==",
       "dev": true
     },
-    "mime-db": {
-      "version": "1.43.0",
-      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.43.0.tgz",
-      "integrity": "sha512-+5dsGEEovYbT8UY9yD7eE4XTc4UwJ1jBYlgaQQF38ENsKR3wj/8q8RFZrF9WIZpB2V1ArTVFUva8sAul1NzRzQ=="
-    },
-    "mime-types": {
-      "version": "2.1.26",
-      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.26.tgz",
-      "integrity": "sha512-01paPWYgLrkqAyrlDorC1uDwl2p3qZT7yl806vW7DvDoxwXi46jsjFbg+WdwotBIk6/MbEhO/dh5aZ5sNj/dWQ==",
-      "requires": {
-        "mime-db": "1.43.0"
-      }
-    },
     "mimic-fn": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-2.1.0.tgz",
diff --git a/package.json b/package.json
index b36753c..e71dc46 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   },
   "license": "MIT",
   "dependencies": {
-    "form-data": "^2.5.0",
+    "formdata-node": "^2.4.0",
     "got": "^11.8.1",
     "query-string": "^6.13.1"
   },
diff --git a/src/index.js b/src/index.js
index c17a29f..ecc008c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,6 +1,6 @@
 const got = require("got");
 const queryString = require("query-string");
-const FormData = require("form-data");
+const FormData = require("formdata-node").default;
 const fs = require("fs");
 const { augmentGenerator } = require("./utils");
 
@@ -114,17 +114,18 @@ module.exports = class CanvasAPI {
   }
 
   async sendSis(endpoint, attachment, body = {}) {
-    const form = new FormData();
+    const fd = new FormData();
 
     for (const key in body) {
-      form.append(key, body[key]);
+      fd.set(key, body[key]);
     }
 
-    form.append("attachment", fs.createReadStream(attachment));
+    fd.set("attachment", fs.createReadStream(attachment));
 
     return this.gotClient
       .post(endpoint, {
-        body: form,
+        body: fd.stream,
+        headers: fd.headers,
       })
       .then((response) => {
         return response;
diff --git a/src/index.test.js b/src/index.test.js
index 335b39c..ea46506 100644
--- a/src/index.test.js
+++ b/src/index.test.js
@@ -161,6 +161,26 @@ test("sendSis returns a parsed JSON object upon success", async (t) => {
   t.deepEqual(response.body, { key: "value" });
 });
 
+test("sendSis throws an error if timeout is over", async (t) => {
+  const server = await createTestServer();
+
+  server.post("/file", (req, res) => {
+    setTimeout(() => {
+      res.send({ key: "value" });
+    }, 2000);
+  });
+
+  const canvas = new Canvas(server.url, "", { timeout: 1 });
+  const tmp = tempy.file();
+  fs.writeFileSync(tmp, "hello world");
+
+  try {
+    await canvas.sendSis("file", tmp);
+  } catch (err) {
+    t.pass();
+  }
+});
+
 test("List throws an error if the endpoint response is not an array", async (t) => {
   const server = await createTestServer();