diff --git a/webgl/CMakeLists.txt b/webgl/CMakeLists.txt
index 6d0147d..af24608 100644
--- a/webgl/CMakeLists.txt
+++ b/webgl/CMakeLists.txt
@@ -104,7 +104,9 @@ set_target_properties(panopainter PROPERTIES
         -s FULL_ES3=1\
         -s USE_PTHREADS=1\
         -s ASSERTIONS=2\
-        -s TOTAL_MEMORY=256Mb\
+        -s TOTAL_MEMORY=512Mb\
+        -s ALLOW_MEMORY_GROWTH=1\
+        -s WASM_MEM_MAX=2048MB\
         --embed-file data\
         --js-library ../src/mylib.js\
         --bind"
diff --git a/webgl/src/main.cpp b/webgl/src/main.cpp
index c8a1bd9..448047c 100644
--- a/webgl/src/main.cpp
+++ b/webgl/src/main.cpp
@@ -263,6 +263,7 @@ int main()
             console.log("syncFS result:");
             console.log(err);
             Module.StartApp();
+            Module.setCanvasSize(window.innerWidth, window.innerHeight);
         });
     );