diff --git a/lib/Makefile b/lib/Makefile
index 2106b746..ee838097 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -10,7 +10,6 @@ LIBPICRIN_SRCS = \
 	pair.c\
 	proc.c\
 	record.c\
-	serialize.c\
 	state.c\
 	string.c\
 	symbol.c\
diff --git a/lib/blob.c b/lib/blob.c
index 5b94ad86..659f62c9 100644
--- a/lib/blob.c
+++ b/lib/blob.c
@@ -6,6 +6,213 @@
 #include "value.h"
 #include "object.h"
 
+static void dump1(unsigned char c, unsigned char *buf, int *len) {
+  if (buf) {
+    buf[*len] = c;
+  }
+  *len = *len + 1;
+}
+
+static void dump4(unsigned long n, unsigned char *buf, int *len) {
+  assert(sizeof(long) * CHAR_BIT <= 32 || n <= 0xfffffffful);
+
+  dump1((n & 0xff), buf, len);
+  dump1((n & 0xff00) >> 8, buf, len);
+  dump1((n & 0xff0000) >> 16, buf, len);
+  dump1((n & 0xff000000) >> 24, buf, len);
+}
+
+static void dump_obj(pic_state *pic, pic_value obj, unsigned char *buf, int *len);
+
+#define IREP_FLAGS_MASK (IREP_VARG)
+
+static void
+dump_irep(pic_state *pic, struct irep *irep, unsigned char *buf, int *len)
+{
+  size_t i;
+  dump1(irep->argc, buf, len);
+  dump1(irep->flags & IREP_FLAGS_MASK, buf, len);
+  dump1(irep->frame_size, buf, len);
+  dump1(irep->irepc, buf, len);
+  dump1(irep->objc, buf, len);
+  dump4(irep->codec, buf, len);
+  for (i = 0; i < irep->objc; ++i) {
+    dump_obj(pic, irep->obj[i], buf, len);
+  }
+  for (i = 0; i < irep->codec; ++i) {
+    dump1(irep->code[i], buf, len);
+  }
+  for (i = 0; i < irep->irepc; ++i) {
+    dump_irep(pic, irep->irep[i], buf, len);
+  }
+}
+
+static void
+dump_obj(pic_state *pic, pic_value obj, unsigned char *buf, int *len)
+{
+  if (pic_int_p(pic, obj)) {
+    dump1(0x00, buf, len);
+    dump4(pic_int(pic, obj), buf, len);
+  } else if (pic_str_p(pic, obj)) {
+    int l, i;
+    const char *str = pic_str(pic, obj, &l);
+    dump1(0x01, buf, len);
+    dump4(l, buf, len);
+    for (i = 0; i < l; ++i) {
+      dump1(str[i], buf, len);
+    }
+    dump1(0, buf, len);
+  } else if (pic_sym_p(pic, obj)) {
+    int l, i;
+    const char *str = pic_str(pic, pic_sym_name(pic, obj), &l);
+    dump1(0x02, buf, len);
+    dump4(l, buf, len);
+    for (i = 0; i < l; ++i) {
+      dump1(str[i], buf, len);
+    }
+    dump1(0, buf, len);
+  } else if (pic_proc_p(pic, obj)) {
+    if (pic_proc_func_p(pic, obj)) {
+      pic_error(pic, "dump: c function procedure serialization unsupported", 1, obj);
+    }
+    if (proc_ptr(pic, obj)->env) {
+      pic_error(pic, "dump: local procedure serialization unsupported", 1, obj);
+    }
+    dump1(0x03, buf, len);
+    dump_irep(pic, proc_ptr(pic, obj)->u.irep, buf, len);
+  } else if (pic_char_p(pic, obj)) {
+    dump1(0x04, buf, len);
+    dump1(pic_char(pic, obj), buf, len);
+  } else {
+    pic_error(pic, "dump: unsupported object", 1, obj);
+  }
+}
+
+pic_value
+pic_serialize(pic_state *pic, pic_value obj)
+{
+  int len = 0;
+  pic_value blob;
+  dump_obj(pic, obj, NULL, &len);
+  blob = pic_blob_value(pic, NULL, len);
+  len = 0;
+  dump_obj(pic, obj, pic_blob(pic, blob, NULL), &len);
+  return blob;
+}
+
+static void loadn(pic_state *pic, unsigned char *dst, size_t size, const unsigned char **buf, const unsigned char *end) {
+  if (*buf + size > end) {
+    pic_error(pic, "malformed bytevector", 0);
+  }
+  memcpy(dst, *buf, size);
+  *buf = *buf + size;
+}
+
+static unsigned char load1(pic_state *pic, const unsigned char **buf, const unsigned char *end) {
+  unsigned char c;
+  loadn(pic, &c, 1, buf, end);
+  return c;
+}
+
+static unsigned long load4(pic_state *pic, const unsigned char **buf, const unsigned char *end) {
+  unsigned long x = load1(pic, buf, end);
+  x += load1(pic, buf, end) << 8;
+  x += load1(pic, buf, end) << 16;
+  x += load1(pic, buf, end) << 24;
+  return x;
+}
+
+static pic_value load_obj(pic_state *pic, const unsigned char **buf, const unsigned char *end);
+
+static struct irep *
+load_irep(pic_state *pic, const unsigned char **buf, const unsigned char *end)
+{
+  unsigned char argc, flags, frame_size, irepc, objc;
+  size_t codec, i;
+  pic_value *obj;
+  unsigned char *code;
+  struct irep **irep, *ir;
+  size_t ai = pic_enter(pic);
+
+  argc = load1(pic, buf, end);
+  flags = load1(pic, buf, end);
+  frame_size = load1(pic, buf, end);
+  irepc = load1(pic, buf, end);
+  objc = load1(pic, buf, end);
+  codec = load4(pic, buf, end);
+  obj = pic_malloc(pic, sizeof(pic_value) * objc);
+  for (i = 0; i < objc; ++i) {
+    obj[i] = load_obj(pic, buf, end);
+  }
+  code = pic_malloc(pic, codec); /* TODO */
+  loadn(pic, code, codec, buf, end);
+  irep = pic_malloc(pic, sizeof(struct irep *) * irepc);
+  for (i = 0; i < irepc; ++i) {
+    irep[i] = load_irep(pic, buf, end);
+  }
+  ir = (struct irep *) pic_obj_alloc(pic, PIC_TYPE_IREP);
+  ir->argc = argc;
+  ir->flags = flags;
+  ir->frame_size = frame_size;
+  ir->irepc = irepc;
+  ir->objc = objc;
+  ir->codec = codec;
+  ir->obj = obj;
+  ir->code = code;
+  ir->irep = irep;
+  pic_leave(pic, ai);
+  pic_protect(pic, obj_value(pic, ir));
+  return ir;
+}
+
+static pic_value
+load_obj(pic_state *pic, const unsigned char **buf, const unsigned char *end)
+{
+  int type, l;
+  pic_value obj;
+  char *dat, c;
+  struct irep *irep;
+  struct proc *proc;
+  type = load1(pic, buf, end);
+  switch (type) {
+  case 0x00:
+    return pic_int_value(pic, load4(pic, buf, end));
+  case 0x01:
+    l = load4(pic, buf, end);
+    dat = pic_malloc(pic, l + 1); /* TODO */
+    loadn(pic, (unsigned char *) dat, l + 1, buf, end);
+    obj = pic_str_value(pic, dat, l);
+    pic_free(pic, dat);
+    return obj;
+  case 0x02:
+    l = load4(pic, buf, end);
+    dat = pic_malloc(pic, l + 1); /* TODO */
+    loadn(pic, (unsigned char *) dat, l + 1, buf, end);
+    obj = pic_intern_str(pic, dat, l);
+    pic_free(pic, dat);
+    return obj;
+  case 0x03:
+    irep = load_irep(pic, buf, end);
+    proc = (struct proc *)pic_obj_alloc(pic, PIC_TYPE_PROC_IREP);
+    proc->u.irep = irep;
+    proc->env = NULL;
+    return obj_value(pic, proc);
+  case 0x04:
+    c = load1(pic, buf, end);
+    return pic_char_value(pic, c);
+  default:
+    pic_error(pic, "load: unsupported object", 1, pic_int_value(pic, type));
+  }
+}
+
+pic_value
+pic_deserialize(pic_state *pic, pic_value blob)
+{
+  int len;
+  const unsigned char *buf = pic_blob(pic, blob, &len);
+  return load_obj(pic, &buf, buf + len);
+}
+
 pic_value
 pic_blob_value(pic_state *pic, const unsigned char *buf, int len)
 {
@@ -249,6 +456,28 @@ pic_blob_bytevector_to_list(pic_state *pic)
   return pic_reverse(pic, list);
 }
 
+static pic_value
+pic_blob_object_to_bytevector(pic_state *pic)
+{
+  pic_value obj;
+
+  pic_get_args(pic, "o", &obj);
+
+  return pic_serialize(pic, obj);
+}
+
+static pic_value
+pic_blob_bytevector_to_object(pic_state *pic)
+{
+  pic_value blob;
+
+  pic_get_args(pic, "o", &blob);
+
+  TYPE_CHECK(pic, blob, blob);
+
+  return pic_deserialize(pic, blob);
+}
+
 void
 pic_init_blob(pic_state *pic)
 {
@@ -263,4 +492,6 @@ pic_init_blob(pic_state *pic)
   pic_defun(pic, "bytevector-append", pic_blob_bytevector_append);
   pic_defun(pic, "bytevector->list", pic_blob_bytevector_to_list);
   pic_defun(pic, "list->bytevector", pic_blob_list_to_bytevector);
+  pic_defun(pic, "bytevector->object", pic_blob_bytevector_to_object);
+  pic_defun(pic, "object->bytevector", pic_blob_object_to_bytevector);
 }
diff --git a/lib/serialize.c b/lib/serialize.c
deleted file mode 100644
index 89b80719..00000000
--- a/lib/serialize.c
+++ /dev/null
@@ -1,214 +0,0 @@
-/**
- * See Copyright Notice in picrin.h
- */
-
-#include "picrin.h"
-#include "value.h"
-#include "object.h"
-
-static void dump1(unsigned char c, unsigned char *buf, int *len) {
-  if (buf) {
-    buf[*len] = c;
-  }
-  *len = *len + 1;
-}
-
-static void dump4(unsigned long n, unsigned char *buf, int *len) {
-  assert(sizeof(long) * CHAR_BIT <= 32 || n <= 0xfffffffful);
-
-  dump1((n & 0xff), buf, len);
-  dump1((n & 0xff00) >> 8, buf, len);
-  dump1((n & 0xff0000) >> 16, buf, len);
-  dump1((n & 0xff000000) >> 24, buf, len);
-}
-
-static void dump_obj(pic_state *pic, pic_value obj, unsigned char *buf, int *len);
-
-#define IREP_FLAGS_MASK (IREP_VARG)
-
-static void
-dump_irep(pic_state *pic, struct irep *irep, unsigned char *buf, int *len)
-{
-  size_t i;
-  dump1(irep->argc, buf, len);
-  dump1(irep->flags & IREP_FLAGS_MASK, buf, len);
-  dump1(irep->frame_size, buf, len);
-  dump1(irep->irepc, buf, len);
-  dump1(irep->objc, buf, len);
-  dump4(irep->codec, buf, len);
-  for (i = 0; i < irep->objc; ++i) {
-    dump_obj(pic, irep->obj[i], buf, len);
-  }
-  for (i = 0; i < irep->codec; ++i) {
-    dump1(irep->code[i], buf, len);
-  }
-  for (i = 0; i < irep->irepc; ++i) {
-    dump_irep(pic, irep->irep[i], buf, len);
-  }
-}
-
-static void
-dump_obj(pic_state *pic, pic_value obj, unsigned char *buf, int *len)
-{
-  if (pic_int_p(pic, obj)) {
-    dump1(0x00, buf, len);
-    dump4(pic_int(pic, obj), buf, len);
-  } else if (pic_str_p(pic, obj)) {
-    int l, i;
-    const char *str = pic_str(pic, obj, &l);
-    dump1(0x01, buf, len);
-    dump4(l, buf, len);
-    for (i = 0; i < l; ++i) {
-      dump1(str[i], buf, len);
-    }
-    dump1(0, buf, len);
-  } else if (pic_sym_p(pic, obj)) {
-    int l, i;
-    const char *str = pic_str(pic, pic_sym_name(pic, obj), &l);
-    dump1(0x02, buf, len);
-    dump4(l, buf, len);
-    for (i = 0; i < l; ++i) {
-      dump1(str[i], buf, len);
-    }
-    dump1(0, buf, len);
-  } else if (pic_proc_p(pic, obj)) {
-    if (pic_proc_func_p(pic, obj)) {
-      pic_error(pic, "dump: c function procedure serialization unsupported", 1, obj);
-    }
-    if (proc_ptr(pic, obj)->env) {
-      pic_error(pic, "dump: local procedure serialization unsupported", 1, obj);
-    }
-    dump1(0x03, buf, len);
-    dump_irep(pic, proc_ptr(pic, obj)->u.irep, buf, len);
-  } else if (pic_char_p(pic, obj)) {
-    dump1(0x04, buf, len);
-    dump1(pic_char(pic, obj), buf, len);
-  } else {
-    pic_error(pic, "dump: unsupported object", 1, obj);
-  }
-}
-
-pic_value
-pic_serialize(pic_state *pic, pic_value obj)
-{
-  int len = 0;
-  pic_value blob;
-  dump_obj(pic, obj, NULL, &len);
-  blob = pic_blob_value(pic, NULL, len);
-  len = 0;
-  dump_obj(pic, obj, pic_blob(pic, blob, NULL), &len);
-  return blob;
-}
-
-static void loadn(pic_state *pic, unsigned char *dst, size_t size, const unsigned char **buf, const unsigned char *end) {
-  if (*buf + size > end) {
-    pic_error(pic, "malformed bytevector", 0);
-  }
-  memcpy(dst, *buf, size);
-  *buf = *buf + size;
-}
-
-static unsigned char load1(pic_state *pic, const unsigned char **buf, const unsigned char *end) {
-  unsigned char c;
-  loadn(pic, &c, 1, buf, end);
-  return c;
-}
-
-static unsigned long load4(pic_state *pic, const unsigned char **buf, const unsigned char *end) {
-  unsigned long x = load1(pic, buf, end);
-  x += load1(pic, buf, end) << 8;
-  x += load1(pic, buf, end) << 16;
-  x += load1(pic, buf, end) << 24;
-  return x;
-}
-
-static pic_value load_obj(pic_state *pic, const unsigned char **buf, const unsigned char *end);
-
-static struct irep *
-load_irep(pic_state *pic, const unsigned char **buf, const unsigned char *end)
-{
-  unsigned char argc, flags, frame_size, irepc, objc;
-  size_t codec, i;
-  pic_value *obj;
-  unsigned char *code;
-  struct irep **irep, *ir;
-  size_t ai = pic_enter(pic);
-
-  argc = load1(pic, buf, end);
-  flags = load1(pic, buf, end);
-  frame_size = load1(pic, buf, end);
-  irepc = load1(pic, buf, end);
-  objc = load1(pic, buf, end);
-  codec = load4(pic, buf, end);
-  obj = pic_malloc(pic, sizeof(pic_value) * objc);
-  for (i = 0; i < objc; ++i) {
-    obj[i] = load_obj(pic, buf, end);
-  }
-  code = pic_malloc(pic, codec); /* TODO */
-  loadn(pic, code, codec, buf, end);
-  irep = pic_malloc(pic, sizeof(struct irep *) * irepc);
-  for (i = 0; i < irepc; ++i) {
-    irep[i] = load_irep(pic, buf, end);
-  }
-  ir = (struct irep *) pic_obj_alloc(pic, PIC_TYPE_IREP);
-  ir->argc = argc;
-  ir->flags = flags;
-  ir->frame_size = frame_size;
-  ir->irepc = irepc;
-  ir->objc = objc;
-  ir->codec = codec;
-  ir->obj = obj;
-  ir->code = code;
-  ir->irep = irep;
-  pic_leave(pic, ai);
-  pic_protect(pic, obj_value(pic, ir));
-  return ir;
-}
-
-static pic_value
-load_obj(pic_state *pic, const unsigned char **buf, const unsigned char *end)
-{
-  int type, l;
-  pic_value obj;
-  char *dat, c;
-  struct irep *irep;
-  struct proc *proc;
-  type = load1(pic, buf, end);
-  switch (type) {
-  case 0x00:
-    return pic_int_value(pic, load4(pic, buf, end));
-  case 0x01:
-    l = load4(pic, buf, end);
-    dat = pic_malloc(pic, l + 1); /* TODO */
-    loadn(pic, (unsigned char *) dat, l + 1, buf, end);
-    obj = pic_str_value(pic, dat, l);
-    pic_free(pic, dat);
-    return obj;
-  case 0x02:
-    l = load4(pic, buf, end);
-    dat = pic_malloc(pic, l + 1); /* TODO */
-    loadn(pic, (unsigned char *) dat, l + 1, buf, end);
-    obj = pic_intern_str(pic, dat, l);
-    pic_free(pic, dat);
-    return obj;
-  case 0x03:
-    irep = load_irep(pic, buf, end);
-    proc = (struct proc *)pic_obj_alloc(pic, PIC_TYPE_PROC_IREP);
-    proc->u.irep = irep;
-    proc->env = NULL;
-    return obj_value(pic, proc);
-  case 0x04:
-    c = load1(pic, buf, end);
-    return pic_char_value(pic, c);
-  default:
-    pic_error(pic, "load: unsupported object", 1, pic_int_value(pic, type));
-  }
-}
-
-pic_value
-pic_deserialize(pic_state *pic, pic_value blob)
-{
-  int len;
-  const unsigned char *buf = pic_blob(pic, blob, &len);
-  return load_obj(pic, &buf, buf + len);
-}