diff --git a/user-programs.sh b/user-programs.sh
index e872046..a7838af 100644
--- a/user-programs.sh
+++ b/user-programs.sh
@@ -16,12 +16,11 @@ sudo apt-get install -y vlc
 sudo apt-get install -y ffmpeg ffmpeg-doc
 
 # OBS studio (screen recording)
-echo '' | add-apt-repository ppa:obsproject/obs-studio
-sudo apt-get update
+sudo add-apt-repository -y ppa:obsproject/obs-studio
 sudo apt-get install -y obs-studio
 
 # FreeCAD (3D parametric modeling)
-echo '' | sudo add-apt-repository ppa:freecad-maintainers/freecad-stable
+sudo add-apt-repository -y ppa:freecad-maintainers/freecad-stable
 sudo apt-get install -y freecad freecad-doc
 
 # 3D printing slicer