diff --git a/roles/nginx/templates/vhosts/o.libertus.eu.conf.j2 b/roles/nginx/templates/vhosts/o.libertus.eu.conf.j2
index cd5a636..3b5c9bb 100644
--- a/roles/nginx/templates/vhosts/o.libertus.eu.conf.j2
+++ b/roles/nginx/templates/vhosts/o.libertus.eu.conf.j2
@@ -59,6 +59,16 @@ server {
 	# Remove X-Powered-By, which is an information leak
 	fastcgi_hide_header X-Powered-By;
 
+	# Set .mjs and .wasm MIME types
+	# Either include it in the default mime.types list
+	# and include that list explicitly or add the file extension
+	# only for Nextcloud like below:
+	include mime.types;
+	types {
+		text/javascript mjs;
+		application/wasm wasm;
+	}
+
 	# Specify how to handle directories -- specifying `/index.php$request_uri`
 	# here as the fallback means that Nginx always exhibits the desired behaviour
 	# when a client requests a path that corresponds to a directory that exists