diff --git a/src/network/CrossPointWebServer.cpp b/src/network/CrossPointWebServer.cpp
index 01e1e48..8f5d844 100644
--- a/src/network/CrossPointWebServer.cpp
+++ b/src/network/CrossPointWebServer.cpp
@@ -221,7 +221,10 @@ void CrossPointWebServer::handleClient() const {
 }
 
 void CrossPointWebServer::handleRoot() const {
-  server->send(200, "text/html", HomePageHtml);
+  // Use chunked sending for consistency with handleFileList (avoids String allocation)
+  server->setContentLength(strlen(HomePageHtml));
+  server->send(200, "text/html", "");
+  server->sendContent_P(HomePageHtml);
   Serial.printf("[%lu] [WEB] Served root page\n", millis());
 }
 
@@ -319,7 +322,14 @@ bool CrossPointWebServer::isEpubFile(const String& filename) const {
   return lower.endsWith(".epub");
 }
 
-void CrossPointWebServer::handleFileList() const { server->send(200, "text/html", FilesPageHtml); }
+void CrossPointWebServer::handleFileList() const {
+  // Use chunked sending to avoid allocating 64KB+ contiguous RAM for String conversion.
+  // The original server->send(200, "text/html", FilesPageHtml) fails when heap is fragmented
+  // because it tries to create a String from the large PROGMEM array.
+  server->setContentLength(strlen(FilesPageHtml));
+  server->send(200, "text/html", "");
+  server->sendContent_P(FilesPageHtml);
+}
 
 void CrossPointWebServer::handleFileListData() const {
   // Get current path from query string (default to root)