diff --git a/Makefile.in b/Makefile.in
index 70da145182b..79c6e7e345a 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -129,7 +129,7 @@ LIBSYNTAX_DSYM_GLOB :=$(call CFG_LIB_DSYM_GLOB,syntax)
 
 # version-string calculation
 CFG_GIT_DIR := $(CFG_SRC_DIR).git
-CFG_RELEASE = 0.3.1
+CFG_RELEASE = 0.4
 CFG_VERSION = $(CFG_RELEASE)
 
 ifneq ($(wildcard $(CFG_GIT)),)
diff --git a/src/cargo/cargo.rc b/src/cargo/cargo.rc
index 1a3b0d3bf85..9e6c3dd085c 100644
--- a/src/cargo/cargo.rc
+++ b/src/cargo/cargo.rc
@@ -10,7 +10,7 @@
 // End:
 
 #[link(name = "cargo",
-       vers = "0.3",
+       vers = "0.4",
        uuid = "9ff87a04-8fed-4295-9ff8-f99bb802650b",
        url = "https://github.com/mozilla/rust/tree/master/src/cargo")];
 
@@ -21,10 +21,10 @@
 #[allow(vecs_implicitly_copyable,
         non_implicitly_copyable_typarams)];
 
-use core(vers = "0.3");
-use std(vers = "0.3");
-use rustc(vers = "0.3");
-use syntax(vers = "0.3");
+use core(vers = "0.4");
+use std(vers = "0.4");
+use rustc(vers = "0.4");
+use syntax(vers = "0.4");
 
 import core::*;
 
diff --git a/src/compiletest/compiletest.rc b/src/compiletest/compiletest.rc
index 7dc3e20ab0f..685f2009e26 100644
--- a/src/compiletest/compiletest.rc
+++ b/src/compiletest/compiletest.rc
@@ -4,8 +4,8 @@
 
 #[allow(vecs_implicitly_copyable)];
 
-use core(vers = "0.3");
-use std(vers = "0.3");
+use core(vers = "0.4");
+use std(vers = "0.4");
 
 import core::*;
 
diff --git a/src/fuzzer/fuzzer.rc b/src/fuzzer/fuzzer.rc
index 7c8fb81d979..95711c7790c 100644
--- a/src/fuzzer/fuzzer.rc
+++ b/src/fuzzer/fuzzer.rc
@@ -6,9 +6,9 @@
 
 #[allow(vecs_implicitly_copyable)];
 
-use core(vers = "0.3");
-use std(vers = "0.3");
-use syntax(vers = "0.3");
+use core(vers = "0.4");
+use std(vers = "0.4");
+use syntax(vers = "0.4");
 
 import core::*;
 
diff --git a/src/libcore/core.rc b/src/libcore/core.rc
index 626b6e512b2..e6bb4730fae 100644
--- a/src/libcore/core.rc
+++ b/src/libcore/core.rc
@@ -1,5 +1,5 @@
 #[link(name = "core",
-       vers = "0.3",
+       vers = "0.4",
        uuid = "c70c24a7-5551-4f73-8e37-380b11d80be8",
        url = "https://github.com/mozilla/rust/tree/master/src/libcore")];
 
diff --git a/src/libcore/core.rs b/src/libcore/core.rs
index 28c08a6c955..4d875e45796 100644
--- a/src/libcore/core.rs
+++ b/src/libcore/core.rs
@@ -58,7 +58,7 @@ export add, sub, mul, div, modulo, neg, bitand, bitor, bitxor;
 export shl, shr, index;
 
 #[cfg(test)]
-use coreops(name = "core", vers = "0.3");
+use coreops(name = "core", vers = "0.4");
 
 #[cfg(test)]
 import coreops::ops::{const, copy, send, owned};
@@ -96,7 +96,7 @@ mod core {
 // Similar to above. Some magic to make core testable.
 #[cfg(test)]
 mod std {
-    use std(vers = "0.3");
+    use std(vers = "0.4");
     import std::test;
 }
 
diff --git a/src/libstd/std.rc b/src/libstd/std.rc
index 765aff74197..956f9f4692b 100644
--- a/src/libstd/std.rc
+++ b/src/libstd/std.rc
@@ -1,5 +1,5 @@
 #[link(name = "std",
-       vers = "0.3",
+       vers = "0.4",
        uuid = "122bed0b-c19b-4b82-b0b7-7ae8aead7297",
        url = "https://github.com/mozilla/rust/tree/master/src/libstd")];
 
@@ -12,7 +12,7 @@
 
 #[allow(vecs_implicitly_copyable)];
 
-use core(vers = "0.3");
+use core(vers = "0.4");
 import core::*;
 
 export net, net_tcp, net_ip, net_url;
diff --git a/src/libsyntax/syntax.rc b/src/libsyntax/syntax.rc
index 7ccd46a5c1d..ac24da71d25 100644
--- a/src/libsyntax/syntax.rc
+++ b/src/libsyntax/syntax.rc
@@ -1,5 +1,5 @@
 #[link(name = "syntax",
-       vers = "0.3",
+       vers = "0.4",
        uuid = "9311401b-d6ea-4cd9-a1d9-61f89499c645")];
 
 
@@ -10,8 +10,8 @@
 
 #[allow(vecs_implicitly_copyable)];
 
-use core(vers = "0.3");
-use std(vers = "0.3");
+use core(vers = "0.4");
+use std(vers = "0.4");
 
 import core::*;
 
diff --git a/src/rustc/driver/rustc.rs b/src/rustc/driver/rustc.rs
index cd4e3276877..d1929a68629 100644
--- a/src/rustc/driver/rustc.rs
+++ b/src/rustc/driver/rustc.rs
@@ -1,10 +1,10 @@
 #[no_core];
 #[allow(vecs_implicitly_copyable)];
 
-use core(vers = "0.3");
-use std(vers = "0.3");
-use rustc(vers = "0.3");
-use syntax(vers = "0.3");
+use core(vers = "0.4");
+use std(vers = "0.4");
+use rustc(vers = "0.4");
+use syntax(vers = "0.4");
 
 import core::*;
 
diff --git a/src/rustc/rustc.rc b/src/rustc/rustc.rc
index ce77613da06..da347abad87 100644
--- a/src/rustc/rustc.rc
+++ b/src/rustc/rustc.rc
@@ -1,7 +1,7 @@
 // -*- rust -*-
 
 #[link(name = "rustc",
-       vers = "0.3",
+       vers = "0.4",
        uuid = "0ce89b41-2f92-459e-bbc1-8f5fe32f16cf",
        url = "https://github.com/mozilla/rust/tree/master/src/rustc")];
 
@@ -14,9 +14,9 @@
 #[allow(vecs_implicitly_copyable)];
 // #[warn(deprecated_pattern)];
 
-use core(vers = "0.3");
-use std(vers = "0.3");
-use syntax(vers = "0.3");
+use core(vers = "0.4");
+use std(vers = "0.4");
+use syntax(vers = "0.4");
 
 import core::*;
 
diff --git a/src/rustdoc/rustdoc.rc b/src/rustdoc/rustdoc.rc
index 46af3e6a73f..4129a325627 100644
--- a/src/rustdoc/rustdoc.rc
+++ b/src/rustdoc/rustdoc.rc
@@ -1,7 +1,7 @@
 //! Rustdoc - The Rust documentation generator
 
 #[link(name = "rustdoc",
-       vers = "0.3",
+       vers = "0.4",
        uuid = "f8abd014-b281-484d-a0c3-26e3de8e2412",
        url = "https://github.com/mozilla/rust/tree/master/src/rustdoc")];
 
@@ -14,10 +14,10 @@
 #[allow(vecs_implicitly_copyable,
         non_implicitly_copyable_typarams)];
 
-use core(vers = "0.3");
-use std(vers = "0.3");
-use rustc(vers = "0.3");
-use syntax(vers = "0.3");
+use core(vers = "0.4");
+use std(vers = "0.4");
+use rustc(vers = "0.4");
+use syntax(vers = "0.4");
 
 import core::*;
 import std::par;
diff --git a/src/test/run-pass/use.rs b/src/test/run-pass/use.rs
index 3bdede237ce..93cdbf9e865 100644
--- a/src/test/run-pass/use.rs
+++ b/src/test/run-pass/use.rs
@@ -1,7 +1,7 @@
 #[no_core];
 use core;
 use zed(name = "core");
-use bar(name = "core", vers = "0.3");
+use bar(name = "core", vers = "0.4");
 
 
 import core::str;