diff --git a/.gitignore b/.gitignore
index a98d9e0..9c06ad8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -96,3 +96,5 @@
 /llvm-12.0.0rc2.src.tar.xz.sig
 /llvm-12.0.0rc3.src.tar.xz
 /llvm-12.0.0rc3.src.tar.xz.sig
+/llvm-12.0.0rc4.src.tar.xz
+/llvm-12.0.0rc4.src.tar.xz.sig
diff --git a/sources b/sources
index e4a25f4..e2ae4a5 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (llvm-12.0.0rc3.src.tar.xz) = c8a6b9f9b20474d8219b07e0ff3aca03022e878b241a434530c9fe210e959125194982bf8c6d291128133a0f393a95234a052be2687b72c5edb2b802fe916c99
-SHA512 (llvm-12.0.0rc3.src.tar.xz.sig) = bafc8119c1d7c042e99b26215d56e65f32caa771007edf95892c9fd30d2e13f70e2c5071e0f9d198a09a1b9046235fcac3f66238c91dec00835b49a11f033174
+SHA512 (llvm-12.0.0rc4.src.tar.xz) = 59b3b31c29314b821c33b808a0c7ec04615016d12955cceded00c43df8b4754c327e019d3b922afb7b3d99e795c501d55aa3ee6339f582bf89e6a05f0da8a0e4
+SHA512 (llvm-12.0.0rc4.src.tar.xz.sig) = a3c333fc3db130208f6c8854b4e07b398241e228ee57d3d257bc26cf085abcaeba931c20efb01723a91c062a9385ad7d3377d313be2ef9b6638e2247afec37b8