diff --git a/experimental/babel-preset-env/CONTRIBUTING.md b/experimental/babel-preset-env/CONTRIBUTING.md
index 90d1f85d1c..37a61f001f 100644
--- a/experimental/babel-preset-env/CONTRIBUTING.md
+++ b/experimental/babel-preset-env/CONTRIBUTING.md
@@ -8,7 +8,7 @@ Example:
 
 In you were going to add `**` which is in ES2016:
 
-Find the relevant entries on [compat-table](kangax.github.io/compat-table/):
+Find the relevant entries on [compat-table](https://kangax.github.io/compat-table/):
 
 `exponentiation (**) operator`