Updated depot_tools link (#4498)
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2ba6609..368a512 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -23,7 +23,7 @@
* git (used for source version control).
* An IDE. We recommend [IntelliJ with the Flutter plugin](https://flutter.io/intellij-ide/) or Xcode.
* An ssh client (used to authenticate with GitHub).
- * Chromium's [depot_tools](http://www.chromium.org/developers/how-tos/install-depot-tools) (make sure it's in your path). We use the `gclient` tool from depot_tools.
+ * Chromium's [depot_tools](http://commondatastorage.googleapis.com/chrome-infra-docs/flat/depot_tools/docs/html/depot_tools_tutorial.html#_setting_up) (make sure it's in your path). We use the `gclient` tool from depot_tools.
* Python (used by many of our tools, including 'gclient').
* On Mac OS X and Linux: curl and unzip (used by `gclient sync`).
* On Windows: Visual Studio (required for non-Googlers only).
