diff --git a/Makefile b/Makefile
index 32b2efe..eef4ccc 100644
--- a/Makefile
+++ b/Makefile
@@ -339,10 +339,10 @@ ifeq ($(MCL_USE_LLVM),2)
   SHE_C_DEP+=src/base64m.ll
 endif
 ../she-wasm/she_c.js: src/she_c256.cpp $(SHE_C_DEP)
-	emcc -o $@ src/fp.cpp src/she_c256.cpp $(EMCC_OPT) -DMCL_MAX_BIT_SIZE=256 -s TOTAL_MEMORY=67108864 -s DISABLE_EXCEPTION_CATCHING=0
+	emcc -o $@ src/fp.cpp src/she_c256.cpp $(EMCC_OPT) -DMCL_MAX_BIT_SIZE=256 -s TOTAL_MEMORY=67108864 -s DISABLE_EXCEPTION_CATCHING=1
 
 ../she-wasm/she_c384.js: src/she_c384.cpp $(SHE_C_DEP)
-	emcc -o $@ src/fp.cpp src/she_c384.cpp $(EMCC_OPT) -DMCL_MAX_BIT_SIZE=384 -s TOTAL_MEMORY=67108864 -s DISABLE_EXCEPTION_CATCHING=0
+	emcc -o $@ src/fp.cpp src/she_c384.cpp $(EMCC_OPT) -DMCL_MAX_BIT_SIZE=384 -s TOTAL_MEMORY=67108864 -s DISABLE_EXCEPTION_CATCHING=1
 
 ../mcl-wasm/mcl_c384_256.js: src/bn_c384_256.cpp $(MCL_C_DEP)
 	emcc -o $@ src/fp.cpp src/bn_c384_256.cpp $(EMCC_OPT) -DMCL_MAX_BIT_SIZE=384 -DMCL_USE_WEB_CRYPTO_API -s DISABLE_EXCEPTION_CATCHING=1 -DCYBOZU_DONT_USE_EXCEPTION -DCYBOZU_DONT_USE_STRING -fno-exceptions -MD -MP -MF obj/mcl_c384_256.d