diff --git a/.gitignore b/.gitignore
index 2e8ffca..19a4251 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@
 /mingw-w64-mingw-w64-a5c151e498a8bff9cf2da51b65fa79b65881f71e.zip
 /mingw-w64-mingw-w64-dadc8f83c38992fa4e55e9c90d673c194df70686.zip
 /mingw-w64-mingw-w64-f7337bdf0d70809e720b4e2671758e0c10c16f60.zip
+/mingw-w64-v4.0-rc1.tar.bz2
diff --git a/mingw-winpthreads.spec b/mingw-winpthreads.spec
index 5116f64..8c52a34 100644
--- a/mingw-winpthreads.spec
+++ b/mingw-winpthreads.spec
@@ -1,16 +1,18 @@
 %?mingw_package_header
 
-%global snapshot_date 20141222
-%global snapshot_rev f7337bdf0d70809e720b4e2671758e0c10c16f60
-%global snapshot_rev_short %(echo %snapshot_rev | cut -c1-6)
-%global branch trunk
+#%%global snapshot_date 20141222
+#%%global snapshot_rev f7337bdf0d70809e720b4e2671758e0c10c16f60
+#%%global snapshot_rev_short %(echo %snapshot_rev | cut -c1-6)
+#%%global branch trunk
+
+%global pre rc1
 
 # Run the testsuite
 %global enable_tests 0
 
 Name:           mingw-winpthreads
-Version:        3.9.999
-Release:        0.5.%{branch}.git.%{snapshot_rev_short}.%{snapshot_date}%{?dist}
+Version:        4.0
+Release:        0.1.%{pre}%{?dist}
 Summary:        MinGW pthread library
 # The main license of winpthreads is MIT, but parts of this library
 # are derived from the "Posix Threads library for Microsoft Windows"
@@ -27,7 +29,7 @@ URL:            http://mingw-w64.sourceforge.net/
 # spectool -g mingw-headers.spec
 Source0:        http://sourceforge.net/code-snapshots/git/m/mi/mingw-w64/mingw-w64.git/mingw-w64-mingw-w64-%{snapshot_rev}.zip
 %else
-Source0:        http://downloads.sourceforge.net/mingw-w64/mingw-w64-v%{version}.tar.bz2
+Source0:        http://downloads.sourceforge.net/mingw-w64/mingw-w64-v%{version}%{?pre:-%{pre}}.tar.bz2
 %endif
 
 
@@ -129,7 +131,7 @@ cd mingw-w64-v%{version}
 unzip %{S:0}
 %setup -q -D -T -n mingw-w64-v%{version}/mingw-w64-mingw-w64-%{snapshot_rev}
 %else
-%setup -q -n mingw-w64-v%{version}
+%setup -q -n mingw-w64-v%{version}%{?pre:-%{pre}}
 %endif
 
 
@@ -207,6 +209,9 @@ find $RPM_BUILD_ROOT -name "*.la" -delete
 
 
 %changelog
+* Mon Jan 26 2015 Erik van Pienbroek <epienbro@fedoraproject.org> - 4.0-0.1.rc1
+- Update to 4.0rc1
+
 * Mon Dec 22 2014 Erik van Pienbroek <epienbro@fedoraproject.org> - 3.9.999-0.5.trunk.git.f7337b.20141222
 - Update to 20141222 snapshot (git rev f7337b)
 
diff --git a/sources b/sources
index 2184d6c..892e169 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-592eee2d754dcc647a60d3f6046fe987  mingw-w64-mingw-w64-f7337bdf0d70809e720b4e2671758e0c10c16f60.zip
+67d489701040c624c0d5d6a10248df0d  mingw-w64-v4.0-rc1.tar.bz2