diff --git a/iguana/exchanges/m_js b/iguana/exchanges/m_js
index 7377c2ed0..92d80067c 100755
--- a/iguana/exchanges/m_js
+++ b/iguana/exchanges/m_js
@@ -1,4 +1,4 @@
 cd ..
 echo building...
-emcc -s TOTAL_MEMORY=1000000000 --preload-file coins.json -DFROM_JS -O2 -I../includes -I../crypto777 -s PTHREAD_POOL_SIZE=40 -s USE_PTHREADS=2 -o /var/www/html/index.html exchanges/mm.c ../crypto777/*.c ../crypto777/jpeg/*.c ../crypto777/jpeg/unix/*.c mini-gmp.c secp256k1/src/secp256k1.c -lm ../OSlibs/js/libnanomsg.so
+emcc -s TOTAL_MEMORY=536870912 --preload-file coins.json -DFROM_JS -O2 -I../includes -I../crypto777 -s PTHREAD_POOL_SIZE=40 -s USE_PTHREADS=2 -o /var/www/html/index.html exchanges/mm.c ../crypto777/*.c ../crypto777/jpeg/*.c ../crypto777/jpeg/unix/*.c mini-gmp.c secp256k1/src/secp256k1.c -lm ../OSlibs/js/libnanomsg.so