diff --git a/Project.toml b/Project.toml
index a084af3..8f2b4cc 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Discord"
 uuid = "e67e5439-1494-44b2-b9ab-d191a16377ec"
 authors = ["Chris de Graaf <me@cdg.dev> and contributors"]
-version = "0.1.0"
+version = "0.1.1"
 
 [deps]
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
@@ -11,7 +11,7 @@ Parameters = "d96e819e-fc66-5662-9728-84c9c7592b0a"
 SuperEnum = "5c958174-e7d9-5990-9618-4567de4ba542"
 
 [compat]
-HTTP = "0.8"
+HTTP = "0.9"
 JSON3 = "1"
 Parameters = "0.12"
 SuperEnum = "0.1"
diff --git a/src/Discord.jl b/src/Discord.jl
index 8b4e7e2..afb8752 100644
--- a/src/Discord.jl
+++ b/src/Discord.jl
@@ -4,7 +4,7 @@ using Base.Iterators: Pairs
 
 using Dates: DateTime, ISODateTimeFormat, Millisecond, UTC, now, unix2datetime, year
 
-using HTTP: HTTP, Response, StatusError, escapeuri, header, request
+using HTTP: HTTP, Form, Response, StatusError, escapeuri, header, request
 using JSON3: JSON3, StructTypes
 using Parameters: @with_kw
 using SuperEnum: @se
diff --git a/src/routes.jl b/src/routes.jl
index d0d05c1..8916924 100644
--- a/src/routes.jl
+++ b/src/routes.jl
@@ -15,9 +15,24 @@ function api_call(c, method, path, Into=Nothing, params=Dict();  kwargs...)
         "X-RateLimit-Precision" => "millisecond",
     ]
 
-    body, query = if method in (:PATCH, :PUT, :POST)
-        push!(headers, "Content-Type" => "application/json")
-        JSON3.write(kwargs), params
+    body, query = if method in (:PATCH, :POST, :PUT)
+        if haskey(kwargs, :file)
+            kw_dict = Dict(kwargs)
+            file = pop!(kw_dict, :file)
+            # This is just a hack to allow for easier testing. No user should use this.
+            boundary = NamedTuple()
+            if haskey(kw_dict, :__boundary__)
+                boundary = (; boundary=pop!(kw_dict, :__boundary__))
+            end
+            form = Form(
+                Dict(:file => file, :payload_json => JSON3.write(kw_dict));
+                boundary...,
+            )
+            form, params
+        else
+            push!(headers, "Content-Type" => "application/json")
+            JSON3.write(kwargs), params
+        end
     else
         "", kwargs
     end
diff --git a/test/fixtures/files.bson b/test/fixtures/files.bson
new file mode 100644
index 0000000..b99090a
Binary files /dev/null and b/test/fixtures/files.bson differ
diff --git a/test/routes.jl b/test/routes.jl
index 471dbfd..9a40aee 100644
--- a/test/routes.jl
+++ b/test/routes.jl
@@ -159,3 +159,26 @@ const client = D.BotClient(get(ENV, "DISCORD_TOKEN", ""))
         end
     end
 end
+
+@testset "Sending files" begin
+    playback("files.bson") do
+        guild = D.create_guild(client; name="MyGuild")
+        try
+            channel = D.create_guild_channel(client, guild; name="test")
+            msg = mktempdir() do dir
+                file = joinpath(dir, "foo.json")
+                write(file, "{}")
+                open(file) do f
+                    D.create_message(client, channel; file=f, __boundary__="abcdef")
+                end
+            end
+            attachments = msg.attachments
+            @test length(attachments) == 1
+            attachment = attachments[1]
+            @test attachment.filename == "foo.json"
+            @test attachment.size == 2
+        finally
+            D.delete_guild(client, guild)
+        end
+    end
+end