diff --git a/Formula/p7zip.rb b/Formula/p7zip.rb
index f61763f104..a2d031fb19 100644
--- a/Formula/p7zip.rb
+++ b/Formula/p7zip.rb
@@ -3,7 +3,7 @@ class P7zip < Formula
   homepage "https://p7zip.sourceforge.io/"
   url "https://downloads.sourceforge.net/project/p7zip/p7zip/16.02/p7zip_16.02_src_all.tar.bz2"
   sha256 "5eb20ac0e2944f6cb9c2d51dd6c4518941c185347d4089ea89087ffdd6e2341f"
-  revision 1
+  revision 2
 
   bottle do
     cellar :any_skip_relocation
@@ -20,6 +20,11 @@ class P7zip < Formula
           "patches/13-CVE-2017-17969.patch"
   end
 
+  patch :p4 do
+    url "https://github.com/aonez/Keka/files/2940620/15-Enhanced-encryption-strength.patch.zip"
+    sha256 "838dd2175c3112dc34193e99b8414d1dc1b2b20b861bdde0df2b32dbf59d1ce4"
+  end
+
   def install
     mv "makefile.macosx_llvm_64bits", "makefile.machine"
     system "make", "all3",