diff --git a/debian/changelog b/debian/changelog
index 20b2cff..92002bc 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+ljudge (0.4.0) unstable; urgency=low
+
+  * Fix some threading issues.
+  * Remove some debugging code.
+
+ -- Jun Wu <quark@lihdd.net>  Sun, 10 Nov 2014 21:40:00 +0800
+
 ljudge (0.3.0) unstable; urgency=low
 
   * Initial debian package release.
diff --git a/src/ljudge.cc b/src/ljudge.cc
index 09f9b42..ae48cfd 100644
--- a/src/ljudge.cc
+++ b/src/ljudge.cc
@@ -47,7 +47,7 @@ namespace j = picojson;
 
 #define fatal(...) { fprintf(stderr, __VA_ARGS__); fprintf(stderr, "\n"); cleanup_exit(1); }
 
-#define LJUDGE_VERSION "v0.3"
+#define LJUDGE_VERSION "v0.4"
 
 // truncate log size, ex. compiler log, stdout, stderr, etc.
 #define TRUNC_LOG 65535