diff --git a/script/build-wasm b/script/build-wasm
index ea3c6f0f..ef0517b8 100755
--- a/script/build-wasm
+++ b/script/build-wasm
@@ -91,10 +91,10 @@ runtime_methods='stringToUTF16','AsciiToString'
 # in the `target/scratch` directory
 $emcc                                            \
   -s WASM=1                                      \
-  -s TOTAL_MEMORY=33554432                       \
+  -s INITIAL_MEMORY=33554432                     \
   -s ALLOW_MEMORY_GROWTH=1                       \
   -s MAIN_MODULE=2                               \
-  -s NO_FILESYSTEM=1                             \
+  -s FILESYSTEM=0                                \
   -s NODEJS_CATCH_EXIT=0                         \
   -s NODEJS_CATCH_REJECTION=0                    \
   -s EXPORTED_FUNCTIONS=@${web_dir}/exports.json \