diff --git a/.gitignore b/.gitignore
index 9c75db4..cc4f97c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@
 /libcxx-8.0.0rc1.src.tar.xz
 /libcxx-8.0.0rc2.src.tar.xz
 /libcxx-8.0.0rc3.src.tar.xz
+/libcxx-8.0.0rc4.src.tar.xz
diff --git a/libcxx.spec b/libcxx.spec
index 4292573..65f53ec 100644
--- a/libcxx.spec
+++ b/libcxx.spec
@@ -1,12 +1,12 @@
 # If you need to bootstrap this, turn this on.
 # Otherwise, you have a loop with libcxxabi
 %global bootstrap 0
-%global rc_ver 3
+%global rc_ver 4
 %global libcxx_srcdir libcxx-%{version}%{?rc_ver:rc%{rc_ver}}.src
 
 Name:		libcxx
 Version:	8.0.0
-Release:	0.3%{?rc_ver:.rc%{rc_ver}}%{?dist}
+Release:	0.4%{?rc_ver:.rc%{rc_ver}}%{?dist}
 Summary:	C++ standard library targeting C++11
 License:	MIT or NCSA
 URL:		http://libcxx.llvm.org/
@@ -111,6 +111,9 @@ make install DESTDIR=%{buildroot}
 
 
 %changelog
+* Tue Mar 12 2019 sguelton@redhat.com - 8.0.0-0.4.rc4
+- 8.0.0 Release candidate 4
+
 * Mon Mar 4 2019 sguelton@redhat.com - 8.0.0-0.3.rc3
 - 8.0.0 Release candidate 3
 
diff --git a/sources b/sources
index a6a2232..9901cd0 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (libcxx-8.0.0rc3.src.tar.xz) = f59e6fdd20d18cfb39c426eadcda5a611dc79735fc1fc8c4cebd4106afa35736ceb3500bba7f162bccced1964785fc18c129e9bb68dd6549b205cae14cd46f8b
+SHA512 (libcxx-8.0.0rc4.src.tar.xz) = 9709212f22cc74bd07271f370facf9ef1839a69412ba62c143b1b5b3eefbe2f5ad7649ebebc6a1b8e1f7c6e981e8041e5fc21e78673d084c067184141aa13405