diff --git a/README.md b/README.md
index 84696c3..820bb53 100644
--- a/README.md
+++ b/README.md
@@ -153,6 +153,7 @@ The `asdf` core provides a [security policy](https://github.com/asdf-vm/asdf/sec
 | DevSpace                      | [NeoHsu/asdf-devspace](https://github.com/NeoHsu/asdf-devspace)                                                 | [![Build](https://github.com/NeoHsu/asdf-devspace/workflows/Build/badge.svg)](https://github.com/neohsu/asdf-devspace/actions?query=workflow%3ABuild)                                                                             |
 | DevStream                     | [zhenyuanlau/asdf-dtm](https://github.com/zhenyuanlau/asdf-dtm)                                                 | [![Build](https://github.com/zhenyuanlau/asdf-dtm/workflows/Build/badge.svg)](https://github.com/zhenyuanlau/asdf-dtm/actions?query=workflow%3ABuild)                                                                             |
 | dhall                         | [aaaaninja/asdf-dhall](https://github.com/aaaaninja/asdf-dhall)                                                 | [![Build Status](https://travis-ci.com/aaaaninja/asdf-dhall.svg?branch=master)](https://travis-ci.com/aaaaninja/asdf-dhall)                                                                                                       |
+| difftastic                    | [volf52/asdf-difftastic](https://github.com/volf52/asdf-difftastic)                                             | [![Build](https://github.com/volf52/asdf-difftastic/actions/workflows/build.yml/badge.svg)](https://github.com/volf52/asdf-difftastic)                                                                                            |
 | digdag                        | [jtakakura/asdf-digdag](https://github.com/jtakakura/asdf-digdag)                                               | [![Main workflow](https://github.com/jtakakura/asdf-digdag/workflows/Main%20workflow/badge.svg?branch=master)](https://github.com/jtakakura/asdf-digdag/actions)                                                                  |
 | direnv                        | [asdf-community/asdf-direnv](https://github.com/asdf-community/asdf-direnv)                                     | [![Main workflow](https://github.com/asdf-community/asdf-direnv/workflows/Main%20workflow/badge.svg?branch=master)](https://github.com/asdf-community/asdf-direnv/actions)                                                        |
 | dive                          | [looztra/asdf-dive](https://github.com/looztra/asdf-dive)                                                       | [![Build Status](https://travis-ci.org/looztra/asdf-dive.svg?branch=master)](https://travis-ci.org/looztra/asdf-dive)                                                                                                             |
diff --git a/plugins/difftastic b/plugins/difftastic
new file mode 100644
index 0000000..146fbbb
--- /dev/null
+++ b/plugins/difftastic
@@ -0,0 +1 @@
+repository = https://github.com/volf52/asdf-difftastic.git