diff --git a/Formula/grep.rb b/Formula/grep.rb
index 974fc8c05e..2a0b9fb926 100644
--- a/Formula/grep.rb
+++ b/Formula/grep.rb
@@ -1,9 +1,9 @@
 class Grep < Formula
   desc "GNU grep, egrep and fgrep"
   homepage "https://www.gnu.org/software/grep/"
-  url "https://ftp.gnu.org/gnu/grep/grep-3.3.tar.xz"
-  mirror "https://ftpmirror.gnu.org/grep/grep-3.3.tar.xz"
-  sha256 "b960541c499619efd6afe1fa795402e4733c8e11ebf9fafccc0bb4bccdc5b514"
+  url "https://ftp.gnu.org/gnu/grep/grep-3.4.tar.xz"
+  mirror "https://ftpmirror.gnu.org/grep/grep-3.4.tar.xz"
+  sha256 "58e6751c41a7c25bfc6e9363a41786cff3ba5709cf11d5ad903cf7cce31cc3fb"
 
   bottle do
     cellar :any