diff --git a/src/activities/home/HomeActivity.cpp b/src/activities/home/HomeActivity.cpp
index 0b4c5e48..f54b25e3 100644
--- a/src/activities/home/HomeActivity.cpp
+++ b/src/activities/home/HomeActivity.cpp
@@ -253,6 +253,9 @@ void HomeActivity::onExit() {
 
   // Free the stored cover buffer if any
   freeCoverBuffer();
+
+  // Free ThemeEngine caches to ensure enough memory for reader's grayscale buffers
+  ThemeEngine::ThemeManager::get().clearAssetCaches();
 }
 
 bool HomeActivity::storeCoverBuffer() {