diff --git a/.gitpod.Dockerfile b/.gitpod.Dockerfile
index 4faa6c11c4f3fa5782300e7c27779eb6aa538af8..249d4d641c5b259daa4a1b283b6185cbfef06dc2 100644
--- a/.gitpod.Dockerfile
+++ b/.gitpod.Dockerfile
@@ -5,6 +5,8 @@ USER root
 RUN add-apt-repository universe
 RUN apt update
 RUN apt -y install graphviz
+RUN sudo apt-get update && sudo apt-get install -y matchbox && sudo apt-get clean && sudo rm -rf /var/cache/apt/* && sudo rm -rf /var/lib/apt/lists/* && sudo rm -rf /tmp/*
+
 
 USER gitpod
 
diff --git a/.gitpod.yml b/.gitpod.yml
index 4f767714cbb58ea7d28cc7b35c2baca41ffe3216..69f0db534977dd6d1eb3d071181f4b80fcb66265 100644
--- a/.gitpod.yml
+++ b/.gitpod.yml
@@ -11,6 +11,6 @@ ports:
 
 vscode:
   extensions:
-    - jebbs.plantuml@2.13.12:q7DiD6H5NTesaWYIXmeMMQ==
-    - vsls-contrib.codetour@0.0.37:n/LcXr1DIqz+xFGficwDHA==
+    - vsls-contrib.codetour
     - ritwickdey.liveserver
+    - jebbs.plantuml