diff --git a/.github/workflows/docker-action.yml b/.github/workflows/docker-action.yml
index 8f70750..41e97c6 100644
--- a/.github/workflows/docker-action.yml
+++ b/.github/workflows/docker-action.yml
@@ -5,7 +5,7 @@ name: Docker CI
 on:
   push:
     branches:
-      - master
+      - v8.20
   pull_request:
     branches:
       - '**'
@@ -17,15 +17,16 @@ jobs:
     strategy:
       matrix:
         image:
-          - 'coqorg/coq:dev'
+          - 'coqorg/coq:8.20'
       fail-fast: false
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: coq-community/docker-coq-action@v1
         with:
           opam_file: 'coq-aac-tactics.opam'
           custom_image: ${{ matrix.image }}
 
+
 # See also:
 # https://github.com/coq-community/docker-coq-action#readme
 # https://github.com/erikmd/docker-coq-github-action-demo
diff --git a/.github/workflows/nix-action.yml b/.github/workflows/nix-action.yml
index 1856f11..402cc7f 100644
--- a/.github/workflows/nix-action.yml
+++ b/.github/workflows/nix-action.yml
@@ -5,7 +5,7 @@ name: Nix CI
 on:
   push:
     branches:
-      - master
+      - v8.20
   pull_request:
     paths:
     - .github/workflows/**
@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         overrides:
-          - 'coq = "master"'
+          - 'coq = "v8.20"'
       fail-fast: false
     steps:
       - name: Determine which commit to test
diff --git a/README.md b/README.md
index cf118b0..a9e6dfb 100644
--- a/README.md
+++ b/README.md
@@ -12,10 +12,10 @@ 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/aac-tactics/actions/workflows/docker-action.yml/badge.svg?branch=master
+[docker-action-shield]: https://github.com/coq-community/aac-tactics/actions/workflows/docker-action.yml/badge.svg?branch=v8.20
 [docker-action-link]: https://github.com/coq-community/aac-tactics/actions/workflows/docker-action.yml
 
-[nix-action-shield]: https://github.com/coq-community/aac-tactics/actions/workflows/nix-action.yml/badge.svg?branch=master
+[nix-action-shield]: https://github.com/coq-community/aac-tactics/actions/workflows/nix-action.yml/badge.svg?branch=v8.20
 [nix-action-link]: https://github.com/coq-community/aac-tactics/actions/workflows/nix-action.yml
 
 [contributing-shield]: https://img.shields.io/badge/contributions-welcome-%23f7931e.svg
@@ -49,7 +49,7 @@ such as for binary integer arithmetic and booleans, are provided with the plugin
 - Coq-community maintainer(s):
   - Karl Palmskog ([**@palmskog**](https://github.com/palmskog))
 - License: [GNU Lesser General Public License v3.0 or later](LICENSE)
-- Compatible Coq versions: master (use the corresponding branch or release for other Coq versions)
+- Compatible Coq versions: 8.20 (use the corresponding branch or release for other Coq versions)
 - Compatible OCaml versions: 4.09.0 or later
 - Additional dependencies: none
 - Coq namespace: `AAC_tactics`
diff --git a/coq-aac-tactics.opam b/coq-aac-tactics.opam
index 52a6a1f..eca9fc7 100644
--- a/coq-aac-tactics.opam
+++ b/coq-aac-tactics.opam
@@ -3,7 +3,7 @@
 
 opam-version: "2.0"
 maintainer: "palmskog@gmail.com"
-version: "dev"
+version: "8.20.dev"
 
 homepage: "https://github.com/coq-community/aac-tactics"
 dev-repo: "git+https://github.com/coq-community/aac-tactics.git"
@@ -23,7 +23,7 @@ build: ["dune" "build" "-p" name "-j" jobs]
 depends: [
   "ocaml" {>= "4.09.0"}
   "dune" {>= "3.5"}
-  "coq" {= "dev"}
+  "coq" {>= "8.20" & < "8.21"}
 ]
 
 tags: [
diff --git a/meta.yml b/meta.yml
index 42b1370..cd2257c 100644
--- a/meta.yml
+++ b/meta.yml
@@ -7,7 +7,7 @@ action: true
 nix: true
 plugin: true
 doi: 10.1007/978-3-642-25379-9_14
-branch: master
+branch: 'v8.20'
 coqdoc: true
 coqdoc_index: docs/coqdoc/toc.html
 
@@ -42,25 +42,25 @@ maintainers:
 
 opam-file-maintainer: palmskog@gmail.com
 
-opam-file-version: dev
+opam-file-version: 8.20.dev
 
 license:
   fullname: GNU Lesser General Public License v3.0 or later
   identifier: LGPL-3.0-or-later
 
 supported_coq_versions:
-  text: master (use the corresponding branch or release for other Coq versions)
-  opam: '{= "dev"}'
+  text: 8.20 (use the corresponding branch or release for other Coq versions)
+  opam: '{>= "8.20" & < "8.21"}'
 
 supported_ocaml_versions:
     text: 4.09.0 or later
     opam: '{>= "4.09.0"}'
 
 tested_coq_nix_versions:
-- coq_version: 'master'
+- coq_version: 'v8.20'
 
 tested_coq_opam_versions:
-- version: dev
+- version: '8.20'
 
 namespace: AAC_tactics