diff --git a/docker/decoder-demo.conf.template b/docker/decoder-demo.conf.template
index f84565c68a5b7bae5ad70a7f2423901f281d7492..cf26c02089395791f4eb4569a10a1b9593089dd5 100644
--- a/docker/decoder-demo.conf.template
+++ b/docker/decoder-demo.conf.template
@@ -65,13 +65,20 @@ server {
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_set_header X-Forwarded-Host $host;
-    # websocket headers
+
+    # update https://gitlab.ow2.org/decoder/reverse-proxy/issues/1
     proxy_set_header Upgrade $http_upgrade;
     proxy_set_header Connection $connection_upgrade;
-    #proxy_set_header Connection "upgrade";
     proxy_http_version 1.1;
+    proxy_set_header X-Scheme $scheme;
     proxy_set_header X-NginX-Proxy true;
     proxy_hide_header Content-Security-Policy;
+    # end update https://gitlab.ow2.org/decoder/reverse-proxy/issues/1
+
+    # https://gitlab.ow2.org/decoder/reverse-proxy/-/issues/2
+    client_max_body_size 100M;
+
+    proxy_hide_header X-Frame-Options;
   }
 
   # https://dev.to/danielkun/nginx-everything-about-proxypass-2ona
diff --git a/docker/decoder.conf.template b/docker/decoder.conf.template
index 89202eec65cc61e5b86d3f8a034ca545c18840a3..926b29adbf0575303ae63386fc8a0f30c30b70bd 100644
--- a/docker/decoder.conf.template
+++ b/docker/decoder.conf.template
@@ -12,7 +12,6 @@ map $uriPrefix $upstreamNameWithPortAndPrefix {
   openjml_analyzer openjmlanalyzer:5002;
   javaparser javaparser:5001;
   jmlgen jmlgen:5005;
-  # testar ow2-testar-decoder.xsalto.net:8080;
   testar testar:8080;
   srl srl;
   ner ner;
@@ -61,6 +60,9 @@ server {
     proxy_hide_header Content-Security-Policy;
     # end update https://gitlab.ow2.org/decoder/reverse-proxy/issues/1
 
+    # https://gitlab.ow2.org/decoder/reverse-proxy/-/issues/2
+    client_max_body_size 100M;
+
     proxy_hide_header X-Frame-Options;
   }
 }