diff --git a/.gitignore b/.gitignore
index a2da162..e8b0031 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,9 @@
 /libcxx-9.0.1.src.tar.xz
 /libcxx-10.0.0rc1.src.tar.xz
 /libcxx-10.0.0rc1.src.tar.xz.sig
+/libcxx-10.0.0rc2.src.tar.xz.sig
+/libcxx-10.0.0rc2.src.tar.xz
+/libcxx-10.0.0rc3.src.tar.xz
+/libcxx-10.0.0rc3.src.tar.xz.sig
+/libcxx-10.0.0rc4.src.tar.xz
+/libcxx-10.0.0rc4.src.tar.xz.sig
diff --git a/libcxx.spec b/libcxx.spec
index a7e938e..741af87 100644
--- a/libcxx.spec
+++ b/libcxx.spec
@@ -1,8 +1,8 @@
 # If you need to bootstrap this, turn this on.
 # Otherwise, you have a loop with libcxxabi
 %global bootstrap 0
-%global rc_ver 1
-%global baserelease 0.2
+%global rc_ver 4
+%global baserelease 0.3
 
 %global libcxx_srcdir libcxx-%{version}%{?rc_ver:rc%{rc_ver}}.src
 
@@ -92,6 +92,9 @@ make install DESTDIR=%{buildroot}
 
 
 %changelog
+* Sun Mar 15 2020 sguelton@redhat.com - 10.0.0-0.3.rc4
+- 10.0.0 rc4
+
 * Thu Feb 6 2020 sguelton@redhat.com - 10.0.0-0.2.rc1
 - bootstrap off
 
diff --git a/sources b/sources
index 7748a57..f85ae9f 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (libcxx-10.0.0rc1.src.tar.xz.sig) = 2c66bfc91e928efd978c655ce1c1077c3b2c2d878bca241a2170a6c43195d2d80d399c3036a1643ae2bbe32d30c32267c3939696efcd8c446bef1760efd6c6ab
-SHA512 (libcxx-10.0.0rc1.src.tar.xz) = 8e27b4faf1cb0e277e54904c9ad560000a7ed5f3c3c03324e03e084ba3fbf9d13eeaaa6835e7cd7b80700ad1f4e7b452841d8f2f01225ac18990db633143b5e1
+SHA512 (libcxx-10.0.0rc4.src.tar.xz) = 9532ea70c7d8eaf47bc4a65d199d78399ff7d89c579e754c271ffec7f236b95d917c8fb6b95c80138bad24bffaf85b069280df087cacbe006e1febd7ca52b807
+SHA512 (libcxx-10.0.0rc4.src.tar.xz.sig) = 0795b708ab49a09d88f03a8af162011831eec51b0d737b99510c14716b597cd455292ebf1898d60f4586cd5f4bc7aa66f95c75b51b77388a686ac6dc1f62b16b