diff --git a/src/main/java/ch/vorburger/exec/package-info.java b/src/main/java/ch/vorburger/exec/package-info.java
index 955f68f..be085e9 100644
--- a/src/main/java/ch/vorburger/exec/package-info.java
+++ b/src/main/java/ch/vorburger/exec/package-info.java
@@ -21,11 +21,12 @@
  * Improvements over Apache Commons Exec.
  * Proposed as contribution to Apache Commons Exec in <a href="https://issues.apache.org/jira/browse/EXEC-88">EXEC-88</a>.
  * 
- * <p>The <a href="https://github.com/zeroturnaround/zt-exec">zt-exec</a> library is something similar.</p>
+ * <p>The <a href="https://github.com/zeroturnaround/zt-exec">zt-exec</a> library is something similar.
+ * (<a href="https://github.com/zeroturnaround/zt-exec/pull/25">They unfortunately refused to back link this project</a>.)</p>
  * 
  * @see ch.vorburger.exec.ManagedProcessBuilder 
  * @see ch.vorburger.exec.ManagedProcess
  * 
  * @author Michael Vorburger
  */
-package ch.vorburger.exec;
\ No newline at end of file
+package ch.vorburger.exec;