diff --git a/core-java-modules/core-java-io-4/README.md b/core-java-modules/core-java-io-4/README.md
index 7cc38bb9fe..c837e2bffc 100644
--- a/core-java-modules/core-java-io-4/README.md
+++ b/core-java-modules/core-java-io-4/README.md
@@ -4,5 +4,5 @@ This module contains articles about core Java input and output (IO)
 
 ### Relevant Articles: 
 
-- [Java File Separator vs File Path Separator]
+- [Java File Separator vs File Path Separator](https://www.baeldung.com/java-file-vs-file-path-separator)
 - [[<-- Prev]](/core-java-modules/core-java-io-3)