Update README.md
diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -13,10 +13,10 @@
 
   http://harfbuzz.org/
 
-For license information, see the [COPYING](COPYING).
+For license information, see [COPYING](COPYING).
 
-For build information, see [BUILD](BUILD.md).
+For build information, see [BUILD.md](BUILD.md).
 
-For test execution, see [TESTING](TESTING.md).
+For test execution, see [TESTING.md](TESTING.md).
 
 Documentation: https://harfbuzz.github.io