diff --git a/TOOLS.md b/TOOLS.md
index 16abe349168f9528942a963c51107cd1b2eee98e..70cb0ff125ea0124d7cd2af8f32d2085615ee4db 100644
--- a/TOOLS.md
+++ b/TOOLS.md
@@ -3,9 +3,8 @@
 ## UML: Gaphor
 * gaphor in requirements.txt
 * run_uml.sh
-* gaphor needs 3rd party requirements:
-    * asadddas
-    * dasdas
-    * dsadas
+* gaphor needs 3rd party requirements: PyGObject>=3.38.0 
+    * https://pygobject.readthedocs.io/en/latest/getting_started.html
+    * https://sourceforge.net/projects/pygobjectwin32/files/latest/download