diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 467a9391..1826b12a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -66,7 +66,8 @@ To get the project up and running for development, make sure you have installed:
 
 - [git](https://git-scm.com/)
 - [node](https://nodejs.org/en/) >= 18
-- [pnpm](https://pnpm.io/) (`npm i pnpm -g`)
+- [pnpm](https://pnpm.io/) (`curl -fsSL https://get.pnpm.io/install.sh | env PNPM_VERSION=8.3.1 sh -`)
+  tests failed to work correctly with newer pnpm versions, so we pin 8.3.1 for now. (see issue #833)
 
 then, do the following: