diff --git a/README.md b/README.md
index 7ec3d55e2..4e5babe7d 100644
--- a/README.md
+++ b/README.md
@@ -513,7 +513,7 @@ make
 make test
 ```
 
-See the [Configuration Guide](https://github.com/nasa/osal/blob/master/doc/OSAL-Configuration-guide.pdf) for more information.
+See the [Configuration Guide](https://github.com/nasa/osal/blob/main/doc/OSAL-Configuration-Guide.md) for more information.
 
 See also the autogenerated user's guide: <https://github.com/nasa/cFS/blob/gh-pages/OSAL_Users_Guide.pdf>