diff --git a/lib/httparty/request/body.rb b/lib/httparty/request/body.rb
index 7f02d47..58d6d9e 100644
--- a/lib/httparty/request/body.rb
+++ b/lib/httparty/request/body.rb
@@ -30,17 +30,17 @@ module HTTParty
         normalized_params = params.flat_map { |key, value| HashConversions.normalize_keys(key, value) }
 
         multipart = normalized_params.inject('') do |memo, (key, value)|
-          memo += "--#{boundary}\n"
-          memo += "Content-Disposition: form-data; name='#{key}'"
-          memo += "; filename='#{File.basename(value)}'" if file?(value)
-          memo += "\n"
-          memo += "Content-Type: application/octet-stream\n" if file?(value)
-          memo += "\n"
+          memo += "--#{boundary}\r\n"
+          memo += %(Content-Disposition: form-data; name="#{key}")
+          memo += %(; filename="#{File.basename(value)}") if file?(value)
+          memo += "\r\n"
+          memo += "Content-Type: application/octet-stream\r\n" if file?(value)
+          memo += "\r\n"
           memo += file?(value) ? value.read : value
-          memo += "\n"
+          memo += "\r\n"
         end
 
-        multipart += "--#{boundary}--\n"
+        multipart += "--#{boundary}--\r\n"
       end
 
       def has_file?(hash)
diff --git a/spec/httparty/request/body_spec.rb b/spec/httparty/request/body_spec.rb
index 9626c7c..669677c 100644
--- a/spec/httparty/request/body_spec.rb
+++ b/spec/httparty/request/body_spec.rb
@@ -32,20 +32,20 @@ RSpec.describe HTTParty::Request::Body do
           }
         end
         let(:multipart_params) do
-          "--------------------------c772861a5109d5ef\n" \
-          "Content-Disposition: form-data; name='user[avatar]'; filename='tiny.gif'\n" \
-          "Content-Type: application/octet-stream\n" \
-          "\n" \
-          "GIF89a\u0001\u0000\u0001\u0000\u0000\xFF\u0000,\u0000\u0000\u0000\u0000\u0001\u0000\u0001\u0000\u0000\u0002\u0000;\n" \
-          "--------------------------c772861a5109d5ef\n" \
-          "Content-Disposition: form-data; name='user[first_name]'\n" \
-          "\n" \
-          "John\n" \
-          "--------------------------c772861a5109d5ef\n" \
-          "Content-Disposition: form-data; name='user[last_name]'\n" \
-          "\n" \
-          "Doe\n" \
-          "--------------------------c772861a5109d5ef--\n"
+          "--------------------------c772861a5109d5ef\r\n" \
+          "Content-Disposition: form-data; name=\"user[avatar]\"; filename=\"tiny.gif\"\r\n" \
+          "Content-Type: application/octet-stream\r\n" \
+          "\r\n" \
+          "GIF89a\u0001\u0000\u0001\u0000\u0000\xFF\u0000,\u0000\u0000\u0000\u0000\u0001\u0000\u0001\u0000\u0000\u0002\u0000;\r\n" \
+          "--------------------------c772861a5109d5ef\r\n" \
+          "Content-Disposition: form-data; name=\"user[first_name]\"\r\n" \
+          "\r\n" \
+          "John\r\n" \
+          "--------------------------c772861a5109d5ef\r\n" \
+          "Content-Disposition: form-data; name=\"user[last_name]\"\r\n" \
+          "\r\n" \
+          "Doe\r\n" \
+          "--------------------------c772861a5109d5ef--\r\n"
         end
 
         it { is_expected.to eq multipart_params }