diff --git a/.github/workflows/docker-action.yml b/.github/workflows/docker-action.yml
index 42d6f5e..4b83b68 100644
--- a/.github/workflows/docker-action.yml
+++ b/.github/workflows/docker-action.yml
@@ -20,6 +20,9 @@ jobs:
       matrix:
         image:
           - 'mathcomp/mathcomp-dev:coq-dev'
+          - 'mathcomp/mathcomp:2.1.0-coq-8.18'
+          - 'mathcomp/mathcomp:2.1.0-coq-8.17'
+          - 'mathcomp/mathcomp:2.1.0-coq-8.16'
           - 'mathcomp/mathcomp:2.0.0-coq-8.18'
           - 'mathcomp/mathcomp:2.0.0-coq-8.17'
           - 'mathcomp/mathcomp:2.0.0-coq-8.16'
diff --git a/README.md b/README.md
index 79b8e60..81565d9 100644
--- a/README.md
+++ b/README.md
@@ -11,8 +11,8 @@ Follow the instructions on https://github.com/coq-community/templates to regener
 [![coqdoc][coqdoc-shield]][coqdoc-link]
 [![DOI][doi-shield]][doi-link]
 
-[docker-action-shield]: https://github.com/coq-community/reglang/workflows/Docker%20CI/badge.svg?branch=master
-[docker-action-link]: https://github.com/coq-community/reglang/actions?query=workflow:"Docker%20CI"
+[docker-action-shield]: https://github.com/coq-community/reglang/actions/workflows/docker-action.yml/badge.svg?branch=master
+[docker-action-link]: https://github.com/coq-community/reglang/actions/workflows/docker-action.yml
 
 [contributing-shield]: https://img.shields.io/badge/contributions-welcome-%23f7931e.svg
 [contributing-link]: https://github.com/coq-community/manifesto/blob/master/CONTRIBUTING.md
diff --git a/coq-reglang.opam b/coq-reglang.opam
index 8470a68..b6dc3f5 100644
--- a/coq-reglang.opam
+++ b/coq-reglang.opam
@@ -18,7 +18,7 @@ decidability results and closure properties of regular languages."""
 
 build: ["dune" "build" "-p" name "-j" jobs]
 depends: [
-  "dune" {>= "2.8"}
+  "dune" {>= "3.5"}
   "coq" {>= "8.16"}
   "coq-mathcomp-ssreflect" {>= "2.0"}
   "coq-hierarchy-builder" {>= "1.4.0"}
diff --git a/dune-project b/dune-project
index 855139f..ba21c84 100644
--- a/dune-project
+++ b/dune-project
@@ -1,3 +1,3 @@
-(lang dune 2.8)
-(using coq 0.3)
+(lang dune 3.5)
+(using coq 0.6)
 (name reglang)
diff --git a/meta.yml b/meta.yml
index d214ded..117efa2 100644
--- a/meta.yml
+++ b/meta.yml
@@ -6,7 +6,7 @@ community: true
 action: true
 nix: false
 coqdoc: true
-dune: true
+dune: false
 doi: 10.1007/s10817-018-9460-x
 
 synopsis: >-
@@ -66,6 +66,12 @@ dependencies:
 tested_coq_opam_versions:
 - version: 'coq-dev'
   repo: 'mathcomp/mathcomp-dev'
+- version: '2.1.0-coq-8.18'
+  repo: 'mathcomp/mathcomp'
+- version: '2.1.0-coq-8.17'
+  repo: 'mathcomp/mathcomp'
+- version: '2.1.0-coq-8.16'
+  repo: 'mathcomp/mathcomp'
 - version: '2.0.0-coq-8.18'
   repo: 'mathcomp/mathcomp'
 - version: '2.0.0-coq-8.17'