diff --git a/gleam.toml b/gleam.toml
index 1f47e9c..3fa498d 100644
--- a/gleam.toml
+++ b/gleam.toml
@@ -8,9 +8,9 @@ repository = { type = "github", user = "folospior", repo = "flybycord"}
 gleam_stdlib = ">= 0.44.0 and < 2.0.0"
 gleam_httpc = ">= 4.1.0 and < 5.0.0"
 gleam_http = ">= 4.0.0 and < 5.0.0"
-gleam_json = ">= 2.3.0 and < 3.0.0"
+gleam_json = ">= 3.0.1 and < 4.0.0"
 gleam_time = ">= 1.1.0 and < 2.0.0"
-multipart_form = ">= 1.0.0 and < 2.0.0"
+multipart_form = ">= 1.1.0 and < 2.0.0"
 
 [dev-dependencies]
 gleeunit = ">= 1.0.0 and < 2.0.0"
diff --git a/manifest.toml b/manifest.toml
index e147ba9..63bb677 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -4,19 +4,19 @@
 packages = [
   { name = "gleam_erlang", version = "0.34.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "0C38F2A128BAA0CEF17C3000BD2097EB80634E239CE31A86400C4416A5D0FDCC" },
   { name = "gleam_http", version = "4.0.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_http", source = "hex", outer_checksum = "0A62451FC85B98062E0907659D92E6A89F5F3C0FBE4AB8046C99936BF6F91DBC" },
-  { name = "gleam_httpc", version = "4.1.0", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_http", "gleam_stdlib"], otp_app = "gleam_httpc", source = "hex", outer_checksum = "1A38507AF26CACA145248733688703EADCB734EA971D4E34FB97B7613DECF132" },
-  { name = "gleam_json", version = "2.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_json", source = "hex", outer_checksum = "C55C5C2B318533A8072D221C5E06E5A75711C129E420DD1CE463342106012E5D" },
-  { name = "gleam_stdlib", version = "0.59.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "F8FEE9B35797301994B81AF75508CF87C328FE1585558B0FFD188DC2B32EAA95" },
-  { name = "gleam_time", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_time", source = "hex", outer_checksum = "CBAA68E215BEA961B40F3B1BA7B88741B1EB49572EF5E1154E357A5D152A2A2C" },
-  { name = "gleeunit", version = "1.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "0E6C83834BA65EDCAAF4FE4FB94AC697D9262D83E6F58A750D63C9F6C8A9D9FF" },
-  { name = "multipart_form", version = "1.0.0", build_tools = ["gleam"], requirements = ["gleam_http", "gleam_stdlib"], otp_app = "multipart_form", source = "hex", outer_checksum = "700FEC9E7C82DB2EA3B048AC6C2869095560AB68EBDC97BF207E8DAD9BB3C022" },
+  { name = "gleam_httpc", version = "4.1.1", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_http", "gleam_stdlib"], otp_app = "gleam_httpc", source = "hex", outer_checksum = "C670EBD46FC1472AD5F1F74F1D3938D1D0AC1C7531895ED1D4DDCB6F07279F43" },
+  { name = "gleam_json", version = "3.0.1", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_json", source = "hex", outer_checksum = "5BA154440B22D9800955B1AB854282FA37B97F30F409D76B0824D0A60C934188" },
+  { name = "gleam_stdlib", version = "0.60.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "621D600BB134BC239CB2537630899817B1A42E60A1D46C5E9F3FAE39F88C800B" },
+  { name = "gleam_time", version = "1.2.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_time", source = "hex", outer_checksum = "D71F1AFF7FEB534FF55E5DC58E534E9201BA75A444619788A2E4DEA4EBD87D16" },
+  { name = "gleeunit", version = "1.3.1", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "A7DD6C07B7DA49A6E28796058AA89E651D233B357D5607006D70619CD89DAAAB" },
+  { name = "multipart_form", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_http", "gleam_stdlib"], otp_app = "multipart_form", source = "hex", outer_checksum = "082C77A0C3BB1128FCD55491665E9B72BC943E849B67D02B08CFA6808AD8E47C" },
 ]
 
 [requirements]
 gleam_http = { version = ">= 4.0.0 and < 5.0.0" }
 gleam_httpc = { version = ">= 4.1.0 and < 5.0.0" }
-gleam_json = { version = ">= 2.3.0 and < 3.0.0" }
+gleam_json = { version = ">= 3.0.1 and < 4.0.0" }
 gleam_stdlib = { version = ">= 0.44.0 and < 2.0.0" }
 gleam_time = { version = ">= 1.1.0 and < 2.0.0" }
 gleeunit = { version = ">= 1.0.0 and < 2.0.0" }
-multipart_form = { version = ">= 1.0.0 and < 2.0.0" }
+multipart_form = { version = ">= 1.1.0 and < 2.0.0" }
diff --git a/src/flybycord/file.gleam b/src/flybycord/file.gleam
new file mode 100644
index 0000000..ddb357c
--- /dev/null
+++ b/src/flybycord/file.gleam
@@ -0,0 +1,3 @@
+pub type File {
+  File(name: String, content_type: String, content: BitArray)
+}
diff --git a/src/flybycord/internal/rest.gleam b/src/flybycord/internal/rest.gleam
index 83e9a5e..dc47781 100644
--- a/src/flybycord/internal/rest.gleam
+++ b/src/flybycord/internal/rest.gleam
@@ -1,11 +1,16 @@
 import flybycord/client.{type Client}
 import flybycord/error
+import flybycord/file.{type File}
 import gleam/http
 import gleam/http/request.{type Request}
 import gleam/http/response.{type Response}
 import gleam/httpc
+import gleam/int
+import gleam/list
 import gleam/option.{type Option, None, Some}
 import gleam/result
+import multipart_form
+import multipart_form/field
 
 // CONSTANTS -------------------------------------------------------------------
 
@@ -40,7 +45,7 @@ pub fn new_request(
   |> request.set_host(discord_url)
   |> request.set_path(discord_api_path <> path)
   |> request.set_method(method)
-  |> request.prepend_header("authorization", "Bot" <> client.token)
+  |> request.prepend_header("authorization", "Bot " <> client.token)
   |> request.prepend_header(
     "user-agent",
     "DiscordBot (https://github.com/folospior/flybycord, "
@@ -50,6 +55,38 @@ pub fn new_request(
   |> request.prepend_header("content-type", "application/json")
 }
 
+@internal
+pub fn new_multipart_request(
+  client: Client,
+  method: http.Method,
+  path: String,
+  payload_json: String,
+  files: List(File),
+) {
+  let #(_, file_parts) =
+    files
+    |> list.map_fold(0, fn(acc, file) {
+      #(acc + 1, #(
+        "files[" <> acc |> int.to_string <> "]",
+        field.File(file.name, file.content_type, file.content),
+      ))
+    })
+
+  new_request(client, method, path)
+  |> multipart_form.to_request(
+    [
+      [
+        #(
+          "payload_json",
+          field.StringWithType(payload_json, "application/json"),
+        ),
+      ],
+      file_parts,
+    ]
+    |> list.flatten,
+  )
+}
+
 @internal
 pub fn with_reason(request: Request(a), reason: Option(String)) -> Request(a) {
   case reason {
diff --git a/test/flybycord_test.gleam b/test/flybycord_test.gleam
index 2397582..012c0ee 100644
--- a/test/flybycord_test.gleam
+++ b/test/flybycord_test.gleam
@@ -1,4 +1,9 @@
+import flybycord/client
+import flybycord/file.{File}
+import flybycord/internal/rest
 import flybycord/user/current_user
+import gleam/http
+import gleam/http/request
 import gleam/json
 import gleeunit
 import gleeunit/should
@@ -7,12 +12,6 @@ pub fn main() {
   gleeunit.main()
 }
 
-// gleeunit test functions end in `_test`
-pub fn hello_world_test() {
-  1
-  |> should.equal(1)
-}
-
 pub fn encode_modify_current_test() {
   current_user.new_modify()
   |> current_user.modify_username("fo1o")
@@ -20,3 +19,33 @@ pub fn encode_modify_current_test() {
   |> json.to_string
   |> should.equal("{\"username\":\"fo1o\"}")
 }
+
+pub fn multipart_request_test() {
+  let expected =
+    rest.new_request(client.Client("token"), http.Post, "/")
+    |> request.set_body(<<
+      "--gleam_multipart_form\r\n":utf8,
+      "Content-Disposition: form-data; name=\"payload_json\"\r\n":utf8,
+      "Content-Type: application/json\r\n\r\n":utf8, "{}\r\n":utf8,
+      "--gleam_multipart_form\r\n":utf8,
+      "Content-Disposition: form-data; name=\"files[0]\"; filename=\"name\"\r\n":utf8,
+      "Content-Type: image/png\r\n\r\n":utf8, "test\r\n":utf8,
+      "--gleam_multipart_form\r\n":utf8,
+      "Content-Disposition: form-data; name=\"files[1]\"; filename=\"name2\"\r\n":utf8,
+      "Content-Type: image/jpeg\r\n\r\n":utf8, "jpeg\r\n":utf8,
+      "--gleam_multipart_form--":utf8,
+    >>)
+    |> request.set_header(
+      "content-type",
+      "multipart/form-data; boundary=gleam_multipart_form",
+    )
+
+  let result =
+    rest.new_multipart_request(client.Client("token"), http.Post, "/", "{}", [
+      File("name", "image/png", <<"test":utf8>>),
+      File("name2", "image/jpeg", <<"jpeg":utf8>>),
+    ])
+
+  result
+  |> should.equal(expected)
+}