diff --git a/build/targets.all.mak b/build/targets.all.mak
index be798beb3..39f2dddea 100644
--- a/build/targets.all.mak
+++ b/build/targets.all.mak
@@ -46,10 +46,12 @@ all_official:
 	$(Q) echo "BUILD_FIRMWARE    SIMULATOR WEB JS"
 	$(Q) $(call source_emsdk); $(MAKE) DEBUG=0 PLATFORM=simulator TARGET=web epsilon.official.js
 	$(Q) cp output/release/simulator/web/epsilon.official.js output/all_official/epsilon.js
+	$(Q) cp output/release/simulator/web/epsilon.official.js.mem output/all_official/epsilon.js.mem
 	$(Q) echo "BUILD_FIRMWARE    SIMULATOR WEB PYTHON JS"
 	$(Q) $(MAKE) DEBUG=0 PLATFORM=simulator TARGET=web clean
 	$(Q) $(call source_emsdk); $(MAKE) DEBUG=0 PLATFORM=simulator TARGET=web EPSILON_GETOPT=1 EPSILON_APPS=code epsilon.official.js
 	$(Q) cp output/release/simulator/web/epsilon.official.js output/all_official/epsilon.python.js
+	$(Q) cp output/release/simulator/web/epsilon.official.js.mem output/all_official/epsilon.python.js.mem
 	$(Q) echo "BUILD_FIRMWARE    SIMULATOR ANDROID"
 	$(Q) $(MAKE) PLATFORM=simulator TARGET=android clean
 	$(Q) $(MAKE) PLATFORM=simulator TARGET=android epsilon.official.apk