diff --git a/Modulefile b/Modulefile
index ae8b068..cba8249 100644
--- a/Modulefile
+++ b/Modulefile
@@ -14,4 +14,5 @@ if { $distro == "CentOS" && ![info exists ::env(PROJECT)] && ![info exists ::env
 
 module load tools/gcc-riscv64-unknown-elf/13
 module load tools/cmake
-module load tools/utilities
\ No newline at end of file
+module load tools/utilities
+module load tools/scviewer
\ No newline at end of file
diff --git a/src/sc_main.cpp b/src/sc_main.cpp
index a6e97cb..78d9fbd 100644
--- a/src/sc_main.cpp
+++ b/src/sc_main.cpp
@@ -75,7 +75,7 @@ int sc_main(int argc, char *argv[]) {
         auto tx_trace_type = static_cast<scc::tracer::file_type>(trace_level >> 1); // bit3-bit1 define the kind of transaction trace
         auto trace_default_on = parser.is_set("trace-default-on");
         cfg.set_value("$$$scc_tracer$$$.tx_trace_type", static_cast<unsigned>(scc::tracer::file_type::FTR));
-        cfg.set_value("$$$scc_tracer$$$.sig_trace_type", static_cast<unsigned>(scc::tracer::file_type::SC_VCD));
+        cfg.set_value("$$$scc_tracer$$$.sig_trace_type", static_cast<unsigned>(scc::tracer::file_type::FST));
         tracer = scc::make_unique<scc::configurable_tracer>(file_name, tx_trace_type, enable_sig_trace, trace_default_on);
     }
     ///////////////////////////////////////////////////////////////////////////