diff --git a/update_from_upstream.sh b/update_from_upstream.sh
index 129e3e9..ed9781c 100755
--- a/update_from_upstream.sh
+++ b/update_from_upstream.sh
@@ -1,4 +1,6 @@
 #!/bin/bash
 
+git submodule init
+git submodule update
 git fetch https://github.com/flathub/org.zdoom.GZDoom master  # Fetch the latest changes from the remote master branch
 git merge FETCH_HEAD  # Merge the fetched changes into your current branch
\ No newline at end of file