diff --git a/internal/rosa/gtk.go b/internal/rosa/gtk.go
index 772e9ee..b912d84 100644
--- a/internal/rosa/gtk.go
+++ b/internal/rosa/gtk.go
@@ -9,8 +9,8 @@ import (
 
 func (t Toolchain) newGLib() (pkg.Artifact, string) {
 	const (
-		version  = "2.86.4"
-		checksum = "AfTjBrrxtXXPL6dFa1LfTe40PyPSth62CoIkM5m_VJTUngGLOFHw6I4XE7RGQE8G"
+		version  = "2.87.3"
+		checksum = "iKSLpzZZVfmAZZmqfO1y6uHdlIks4hzPWrqeUCp4ZeQjrPFA3aAa4OmrBYMNS-Si"
 	)
 	return t.NewPackage("glib", version, pkg.NewHTTPGet(
 		nil, "https://download.gnome.org/sources/glib/"+