diff --git a/docker/nginx.tpl.conf b/docker/nginx.tpl.conf
index 0a051eb55..6d459a7f5 100644
--- a/docker/nginx.tpl.conf
+++ b/docker/nginx.tpl.conf
@@ -45,7 +45,7 @@ http {
             set $CSP '${CSP} font-src \'self\' fonts.gstatic.com;';
             set $CSP '${CSP} style-src \'self\' \'unsafe-inline\' fonts.googleapis.com;';
             set $CSP '${CSP} script-src \'self\' \'sha256-dumdnmFtmXukp90IByXXb9z1Q4gMA2R+DyJAVrVqxmw=\' www.google-analytics.com;';
-            set $CSP '${CSP} connect-src \'self\' *.jnode.network *.jwallet.network *.etherscan.io www.google-analytics.com;';
+            set $CSP '${CSP} connect-src \'self\' *.jnode.network *.jwallet.network *.etherscan.io www.google-analytics.com {{ .Env.MAIN_RPC_ADDR }};';
             add_header Content-Security-Policy $CSP;
             root /app;
             try_files $uri /index.html;