diff --git a/extlib/benz b/extlib/benz
index 4fd4e15c..2d805222 160000
--- a/extlib/benz
+++ b/extlib/benz
@@ -1 +1 @@
-Subproject commit 4fd4e15cc196a89e5ed5133896d7b8b9f4b2c10a
+Subproject commit 2d80522230358a4f3f2a1cd1af56da16d0f612d0
diff --git a/src/main.c b/src/main.c
index 9bd66a92..33eb7cf4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,6 +6,9 @@
 #include "picrin/pair.h"
 #include "picrin/error.h"
 
+void pic_init_contrib(pic_state *);
+void pic_load_piclib(pic_state *);
+
 static pic_value
 pic_features(pic_state *pic)
 {
@@ -34,9 +37,6 @@ pic_libraries(pic_state *pic)
   return libs;
 }
 
-void pic_init_contrib(pic_state *);
-void pic_load_piclib(pic_state *);
-
 void
 pic_init_picrin(pic_state *pic)
 {
@@ -55,11 +55,10 @@ pic_init_picrin(pic_state *pic)
 int
 main(int argc, char *argv[], char **envp)
 {
-  xFILE *stdio[3] = { xstdin, xstdout, xstderr };
   pic_state *pic;
   int status = 0;
 
-  pic = pic_open(argc, argv, envp, stdio);
+  pic = pic_open(argc, argv, envp);
 
   pic_init_picrin(pic);