diff --git a/README.md b/README.md
index 1e93b50..6f27c17 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 ![Python application](https://github.com/jvestman/skimibowi/workflows/Python%20application/badge.svg)
 
-[QT](qt.io) Wizard for creating [SKiDL](https://github.com/xesscorp/skidl) descriptions of microcontroller boards. Skimibowi creates Python programs that create [KiCad](http://www.kicad-pcb.org/) netlists ready for PCB layout with Pcbnew.
+[QT](qt.io) Wizard for creating [SKiDL](https://github.com/xesscorp/skidl) descriptions of microcontroller boards. Skimibowi creates Python programs that create [KiCad](http://www.kicad.org/) netlists ready for PCB layout with Pcbnew.
 
 ![Screenshot](wiki/skimibowi1.png)
 
diff --git a/requirements.txt b/requirements.txt
index 18903ee..40ae334 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ mccabe==0.6.1
 ordered-set==3.1.1
 pylint==2.4.4
 pyparsing==2.4.6
-PyYAML==5.3
+PyYAML==5.4
 six==1.14.0
 skidl==0.0.28
 typed-ast==1.4.1