diff --git a/libs/sdl2/source/main.cpp b/libs/sdl2/source/main.cpp
index 65857f99..3e5d6152 100644
--- a/libs/sdl2/source/main.cpp
+++ b/libs/sdl2/source/main.cpp
@@ -13,16 +13,17 @@
 #include <psemek/util/terminal_color.hpp>
 
 #ifdef __EMSCRIPTEN__
-	#include <emscripten/emscripten.h>
-	#include <emscripten/html5.h>
-	#include <emscripten.h>
+#include <emscripten/emscripten.h>
+#include <emscripten/html5.h>
+#include <emscripten.h>
+#include <emscripten/wasmfs.h>
 
-	struct em_state
-	{
-		std::unique_ptr<psemek::app::application> application;
-		std::unique_ptr<psemek::sdl2::window> window;
-		psemek::app::application::context context;
-	} em_state;
+struct em_state
+{
+	std::unique_ptr<psemek::app::application> application;
+	std::unique_ptr<psemek::sdl2::window> window;
+	psemek::app::application::context context;
+} em_state;
 #endif
 
 #undef main
@@ -111,19 +112,17 @@ int main(int argc, char ** argv) try
 	SDL_StopTextInput();
 
 #ifdef __EMSCRIPTEN__
-	emscripten_request_animation_frame_loop([](double, void*) -> EM_BOOL {
+	emscripten_set_main_loop([]{
 		if (sdl2::poll_events(*em_state.application))
 			em_state.application->stop();
 
 		if (!em_state.application->running())
-			return EM_FALSE;
+			emscripten_cancel_main_loop();
 
 		em_state.application->update();
 		em_state.application->present();
 		em_state.window->swap();
-
-		return EM_TRUE;
-	}, nullptr);
+	}, 0, 1);
 #else
 	while (application->running())
 	{
@@ -134,9 +133,10 @@ int main(int argc, char ** argv) try
 		application->present();
 		window.swap();
 	}
-#endif
 
 	log::info() << "Quitting";
+#endif
+
 	return EXIT_SUCCESS;
 }
 catch (psemek::util::exception const & e)
diff --git a/package/web/Dockerfile b/package/web/Dockerfile
index 57307126..d59b4643 100644
--- a/package/web/Dockerfile
+++ b/package/web/Dockerfile
@@ -2,10 +2,12 @@ FROM lisyarus/psemek:package-linux
 
 # Install emsdk - the version the build was tested at
 WORKDIR /home
-RUN git clone --branch 3.1.46 https://github.com/emscripten-core/emsdk.git
+RUN git clone --branch 6.0.2 https://github.com/emscripten-core/emsdk.git
 WORKDIR /home/emsdk
-RUN ./emsdk install 3.1.46
-RUN ./emsdk activate 3.1.46
+RUN ./emsdk install 6.0.2
+RUN ./emsdk activate 6.0.2
+RUN . ./emsdk_env.sh && embuilder build sdl2 sdl2-mt
+
 WORKDIR /home
 COPY env-helper.sh .
 # Source emsdk env variables when running the container
@@ -13,6 +15,7 @@ ENTRYPOINT ["/home/env-helper.sh"]
 
 # Install Boost sources
 WORKDIR /home
+RUN git config --global advice.detachedHead false
 RUN git clone --recurse-submodules --branch boost-1.87.0 https://github.com/boostorg/boost.git
 
 # Install toolchain file & main packaging script
diff --git a/package/web/package.sh b/package/web/package.sh
index 695fe547..7cf64a85 100755
--- a/package/web/package.sh
+++ b/package/web/package.sh
@@ -14,7 +14,7 @@ rm -rf ./*
 # right toolchain.
 emcmake cmake \
   -DBOOST_SOURCE_ROOT=$(realpath ../source)/psemek/3rdparty/boost \
-  -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+  -DCMAKE_BUILD_TYPE=Release \
   -DPSEMEK_PACKAGE_MODE=ON \
   -DPSEMEK_PACKAGE_HOST=OFF \
   -DPSEMEK_PACKAGE_TARGET=ON \