diff --git a/README.md b/README.md
index 6cf5933..6f2eb9b 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,18 @@ If you need platform-specific overrides for these settings, append one of
 `_macos`, `_windows`, `_linux`, `_android`, `_ios`, `_html5` to the config key
 (eg. `buffer_length_android`).
 
+### Raise the heap size on HTML5
+
+FMOD will hiccup and not play sound on HTML5 (particularily Safari on iOS and macOS)
+if it doesn't have enough memory for your banks and sound buffers, especially if
+loaded with `load_bank_memory()`, which copies them into memory. The exact amount 
+depends from game to game, but for this example to run, it needs a 512MB heap.
+
+```
+[html5]
+heap_size = 512
+```
+
 ### Running in the editor
 
 The game will bundle fine, but in order for FMOD to be available when running
diff --git a/game.project b/game.project
index 0ae4441..c40980a 100644
--- a/game.project
+++ b/game.project
@@ -28,3 +28,6 @@ include_dirs = fmod
 lib_path = fmod/res
 speaker_mode = 5.1
 
+[html5]
+heap_size = 512
+