diff --git a/README.md b/README.md
index e37336a4f2..2d9a2f4519 100644
--- a/README.md
+++ b/README.md
@@ -113,7 +113,7 @@ If you are on Ubuntu, this command should cover the most frequently
 used third-party packages:
 
 ```bash
-sudo apt-get install build-essential pkg-config fakeroot python3-dev libpng-dev libjpeg-dev libtiff-dev zlib1g-dev libssl-dev libx11-dev libgl1-mesa-dev libxrandr-dev libxxf86dga-dev libxcursor-dev bison flex libfreetype6-dev libvorbis-dev libeigen3-dev libopenal-dev libode-dev libbullet-dev nvidia-cg-toolkit libgtk2.0-dev libassimp-dev libopenexr-dev
+sudo apt-get install build-essential pkg-config fakeroot python3-dev libpng-dev libjpeg-dev libtiff-dev zlib1g-dev libssl-dev libx11-dev libgl1-mesa-dev libxrandr-dev libxxf86dga-dev libxcursor-dev bison flex libfreetype6-dev libvorbis-dev libeigen3-dev libopenal-dev libode-dev libbullet-dev nvidia-cg-toolkit libgtk-3-dev libassimp-dev libopenexr-dev
 ```
 
 Once Panda3D has built, you can either install the .deb or .rpm package that