diff --git a/tools/devserver/src/main/java/org/teavm/devserver/ProxyWsClient.java b/tools/devserver/src/main/java/org/teavm/devserver/ProxyWsClient.java
index 61f89cfed..e5975a8ca 100644
--- a/tools/devserver/src/main/java/org/teavm/devserver/ProxyWsClient.java
+++ b/tools/devserver/src/main/java/org/teavm/devserver/ProxyWsClient.java
@@ -43,6 +43,8 @@ public class ProxyWsClient {
 
     @OnWebSocketConnect
     public void connect(Session session) {
+        session.getPolicy().setMaxBinaryMessageSize(100_000_000);
+        session.getPolicy().setMaxTextMessageSize(100_000_000);
         this.session = session;
         flush();
         if (target != null) {