diff --git a/Makefile b/Makefile
index ebcb69c..32b2efe 100644
--- a/Makefile
+++ b/Makefile
@@ -329,7 +329,7 @@ test: $(TEST_EXE)
 
 EMCC_OPT=-I./include -I./src -Wall -Wextra
 EMCC_OPT+=-O3 -DNDEBUG -DMCLSHE_WIN_SIZE=8
-EMCC_OPT+=-s WASM=1 -s NO_EXIT_RUNTIME=1 -s MODULARIZE=1 #-s ASSERTIONS=1
+EMCC_OPT+=-s WASM=1 -s NO_EXIT_RUNTIME=1 -s NODEJS_CATCH_EXIT=0 -s NODEJS_CATCH_REJECTION=0  -s MODULARIZE=1 #-s ASSERTIONS=1
 EMCC_OPT+=-DCYBOZU_MINIMUM_EXCEPTION
 EMCC_OPT+=-s ABORTING_MALLOC=0
 SHE_C_DEP=src/fp.cpp src/she_c_impl.hpp include/mcl/she.hpp include/mcl/fp.hpp include/mcl/op.hpp include/mcl/she.h Makefile