diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 98f833723..ff81d6de6 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -21,7 +21,7 @@
 <!--- Go through the points below, and put an `x` in each box that applies. -->
 <!--- If you're unsure about any of these, contact us. We're always glad to help! -->
 - [ ] I have reviewed the guidelines about [Contributing to HyperFormula](https://hyperformula.handsontable.com/guide/contributing.html) and I confirm that my code follows the code style of this project.
-- [ ] I have signed the [Contributor License Agreement](https://goo.gl/forms/yuutGuN0RjsikVpM2).
+- [ ] I have signed the [Contributor License Agreement](https://cla.handsontable.com/sign) — one signature covers both HyperFormula and Handsontable; the `cla/signed` check on this PR confirms it.
 - [ ] My change is compliant with the [OpenDocument](https://docs.oasis-open.org/office/OpenDocument/v1.3/os/part4-formula/OpenDocument-v1.3-os-part4-formula.html) standard.
 - [ ] My change is compatible with Microsoft Excel.
 - [ ] My change is compatible with Google Sheets.
diff --git a/README.md b/README.md
index f1a7b0846..8849c3547 100644
--- a/README.md
+++ b/README.md
@@ -106,7 +106,7 @@ console.log(`${hf.getCellValue({ sheet: sheetId, row: 0, col: 0 })}: ${hf.getCel
 
 ## Contributing
 
-Contributions are welcome, but before you make them, please read the [Contributing Guide](https://hyperformula.handsontable.com/guide/contributing.html) and accept the [Contributor License Agreement](https://goo.gl/forms/yuutGuN0RjsikVpM2).
+Contributions are welcome, but before you make them, please read the [Contributing Guide](https://hyperformula.handsontable.com/guide/contributing.html) and accept the [Contributor License Agreement](https://cla.handsontable.com/sign).
 
 ## License
 
diff --git a/docs/guide/contributing.md b/docs/guide/contributing.md
index ae1a4c7c6..4e75eab37 100644
--- a/docs/guide/contributing.md
+++ b/docs/guide/contributing.md
@@ -30,8 +30,7 @@ are a good starting point.
 
 ## How to get started
 
-1. First, sign this
-[Contributor License Agreement](https://goo.gl/forms/yuutGuN0RjsikVpM2)
+1. First, sign the [Contributor License Agreement](#contributor-license-agreement)
 to allow us to use and publish your changes.
 2. Always make your changes on a separate branch. This will speed up
 the merging process.
@@ -41,6 +40,47 @@ not `master`.
 5. Please lint the code. See the section about using linter.
 6. Add a comprehensive description of all the changes.
 
+## Contributor License Agreement
+
+Handsoncode publishes the code it merges — in open-source releases and in
+commercial products. Doing that requires the right to use, relicense, and
+distribute your contribution, and the Contributor License Agreement (CLA) is the
+record of that permission. You keep the copyright to your work; the CLA grants
+Handsoncode a licence to it.
+
+**Sign it once, for every project.** The signature is recorded against your
+GitHub account, not against a repository, and covers both
+[HyperFormula](https://github.com/handsontable/hyperformula) and
+[Handsontable](https://github.com/handsontable/handsontable). If you have
+already signed for either one, you are done.
+
+**Sign here:
+[cla.handsontable.com/sign](https://cla.handsontable.com/sign)**
+— the [process is explained in
+full](https://cla.handsontable.com/) on the same site.
+
+How it works on your pull request:
+
+1. You open a PR. A GitHub App looks up your GitHub login and sets the
+`cla/signed` status check.
+2. If you have not signed, the check fails and a bot comments with your signing
+link.
+3. Open the link, authenticate with GitHub, read the agreement, and submit the
+form.
+4. The check turns green — on this PR and on any other open PR of yours, in
+either repository.
+
+`cla/signed` is a **required check**, so an unsigned PR cannot be merged.
+Members of the `handsontable` GitHub organization and known bots are exempt.
+
+Signature records are stored in Cloudflare D1 in the EU. For a correction to
+your record or an erasure request, email
+[support@handsontable.com](mailto:support@handsontable.com).
+
+Reviewers: there is nothing to verify by hand — the required check is the
+verification. Never merge a PR whose `cla/signed` check is red, and do not work
+around it.
+
 ## Code of conduct
 
 By participating in this project, you are expected to uphold our
diff --git a/docs/index.md b/docs/index.md
index 0d5de4480..774265a45 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -110,7 +110,7 @@ console.log(`${hf.getCellValue({ sheet: sheetId, row: 0, col: 0 })}: ${hf.getCel
 
 ## Contributing
 
-Contributions are welcome, but before you make them, please read the [Contributing Guide](guide/contributing.md) and accept the [Contributor License Agreement](https://goo.gl/forms/yuutGuN0RjsikVpM2).
+Contributions are welcome, but before you make them, please read the [Contributing Guide](guide/contributing.md) and accept the [Contributor License Agreement](https://cla.handsontable.com/sign).
 
 ## License