diff --git a/llvm.spec b/llvm.spec
index de017c9..b677d72 100644
--- a/llvm.spec
+++ b/llvm.spec
@@ -16,7 +16,7 @@ fi')
 %global maj_ver 19
 %global min_ver 1
 %global patch_ver 0
-%global rc_ver 3
+%global rc_ver 4
 
 %if %{with snapshot_build}
 %include %{_sourcedir}/version.spec.inc
diff --git a/sources b/sources
index be64176..e72da3f 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (llvm-project-19.1.0-rc3.src.tar.xz) = 3ee4eab848e5e38c396e6f5addf5eb42570d451fc8e7cd77150dc5542f8f710f4a9db51836f7a799996dd1b8194defe4d58efe7c19e5d5e1c5f3dbdda94c0cf3
-SHA512 (llvm-project-19.1.0-rc3.src.tar.xz.sig) = ef0fd2e3e7069fbfd410cbcf71294d1b7182456330ff151348058b5cb0f292edaecb9dcbf613ee4fc979214a23bd3bb8077d71e674635359da36b938dc143266
+SHA512 (llvm-project-19.1.0-rc4.src.tar.xz) = 826978a596b26040124f2ceba858f91031f78faca22f32de2eea1a4d299a849dcb1fffdfb01601adc39d733dd0cdee43b21af05159d45dcebc842f6b6b540ba8
+SHA512 (llvm-project-19.1.0-rc4.src.tar.xz.sig) = 5b9dcbf232229fdd87824bc87d0ad4ebd54127c9288708fb3304166422d378b77a843d7c5d8258850a0de59310c24e65042d636a5314e2af8513627a43bdb6e8