diff --git a/docs/project/contribution_tools.md b/docs/project/contribution_tools.md
index 7ebbcf6c308d..c776a323c6c2 100644
--- a/docs/project/contribution_tools.md
+++ b/docs/project/contribution_tools.md
@@ -130,6 +130,8 @@ These tools are essential for work on Carbon.
             outdated, and not be upgraded.
 -   Main tools
     -   [Bazel](https://www.bazel.build/)
+        -   NOTE: See [the bazelisk config](/.bazeliskrc) for a supported
+            version.
     -   [Bazelisk](https://docs.bazel.build/versions/master/install-bazelisk.html)
         (for macOS): Handles Bazel versions.
     -   [Clang](https://clang.llvm.org/) and [LLVM](https://llvm.org/)