diff --git a/Aliases/protobuf@3.15 b/Aliases/protobuf@3.17
similarity index 100%
rename from Aliases/protobuf@3.15
rename to Aliases/protobuf@3.17
diff --git a/Formula/protobuf.rb b/Formula/protobuf.rb
index 7013066d9f0..438af795987 100644
--- a/Formula/protobuf.rb
+++ b/Formula/protobuf.rb
@@ -1,8 +1,8 @@
 class Protobuf < Formula
   desc "Protocol buffers (Google's data interchange format)"
   homepage "https://github.com/protocolbuffers/protobuf/"
-  url "https://github.com/protocolbuffers/protobuf/releases/download/v3.15.8/protobuf-all-3.15.8.tar.gz"
-  sha256 "2b737d6d120418c443c561cf4032c0141f9626f68f532b5d2c27ee8a191c996e"
+  url "https://github.com/protocolbuffers/protobuf/releases/download/v3.17.0/protobuf-all-3.17.0.tar.gz"
+  sha256 "96da1cb0648c7c1b2e68ef7089149dce18ecf8d0582a171315b3991a59e629c6"
   license "BSD-3-Clause"
 
   livecheck do
@@ -28,8 +28,8 @@ class Protobuf < Formula
   depends_on "python@3.9" => [:build, :test]
 
   resource "six" do
-    url "https://files.pythonhosted.org/packages/6b/34/415834bfdafca3c5f451532e8a8d9ba89a21c9743a0c59fbd0205c7f9426/six-1.15.0.tar.gz"
-    sha256 "30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259"
+    url "https://files.pythonhosted.org/packages/71/39/171f1c67cd00715f190ba0b100d606d440a28c93c7714febeca8b79af85e/six-1.16.0.tar.gz"
+    sha256 "1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"
   end
 
   def install