diff --git a/ubuntu-mate/Dockerfile b/ubuntu-mate/Dockerfile
index 439a68b..34120ed 100644
--- a/ubuntu-mate/Dockerfile
+++ b/ubuntu-mate/Dockerfile
@@ -33,7 +33,7 @@ RUN \
   wget -qO- https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > packages.microsoft.gpg && \
   cp packages.microsoft.gpg /etc/apt/keyrings && \
   echo "deb [arch=amd64,arm64,armhf signed-by=/etc/apt/keyrings/packages.microsoft.gpg] https://packages.microsoft.com/repos/code stable main" > /etc/apt/sources.list.d/vscode.list && \
-  add-apt-repository ppa:xtradeb/apps -y
+  add-apt-repository ppa:xtradeb/apps -y && \
   apt-get update && \
   echo "**** Install all packages ****" && \
   mkdir -p /usr/share/man/man1 && \