diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e77df98239..b775db0224 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -40,7 +40,7 @@ Use `fd_util_base.h` types instead of `stdint.h` integer types.
 
 FAQ: Why not `stdint.h`? For more information, see
 - [`fd_util_base.h`](./src/util/fd_util_base.h)
-- [Kevin's rant](./doc/rant/integer-types.txt)
+- [Kevin's rant](./doc/rant/integer-types.md)
 
 **Mapping**