diff --git a/Formula/ignition-gazebo4.rb b/Formula/ignition-gazebo4.rb
index 2a4519c5e..b5ba03e42 100644
--- a/Formula/ignition-gazebo4.rb
+++ b/Formula/ignition-gazebo4.rb
@@ -1,11 +1,11 @@
 class IgnitionGazebo4 < Formula
   desc "Ignition Gazebo robot simulator"
   homepage "https://github.com/ignitionrobotics/ign-gazebo"
-  url "https://github.com/ignitionrobotics/ign-gazebo/archive/b1dd4006ea612f675484f6052a5c84157df2f8ab.tar.gz"
-  version "3.999.999~0~20200224~78c43e7"
-  sha256 "948ddeb9197c4fb8c2ff4cf59f0a86c81c45ae35fc187233ba167d37945af4d4"
+  url "https://github.com/ignitionrobotics/ign-gazebo/archive/9f80d0e69faebbceceb2a79f0fb4c5621f398b89.tar.gz"
+  version "3.999.999~0~20200729~9f80d0"
+  sha256 "39751dcad8f000ba80937533faac5aff0ea81c3ed614a35511643a6955b3976f"
   license "Apache-2.0"
-  revision 2
+  revision 1
 
   head "https://github.com/ignitionrobotics/ign-gazebo", :branch => "master"
 
@@ -19,18 +19,18 @@ class IgnitionGazebo4 < Formula
   depends_on "google-benchmark"
   depends_on "ignition-cmake2"
   depends_on "ignition-common3"
-  depends_on "ignition-fuel-tools4"
+  depends_on "ignition-fuel-tools5"
   depends_on "ignition-gui4"
   depends_on "ignition-math6"
-  depends_on "ignition-msgs5"
-  depends_on "ignition-physics2"
+  depends_on "ignition-msgs6"
+  depends_on "ignition-physics3"
   depends_on "ignition-plugin1"
   depends_on "ignition-rendering4"
   depends_on "ignition-sensors4"
-  depends_on "ignition-transport8"
+  depends_on "ignition-transport9"
   depends_on :macos => :mojave # c++17
   depends_on "pkg-config"
-  depends_on "sdformat9"
+  depends_on "sdformat10"
 
   def install
     ENV.m64