diff --git a/extra/gtk+3/checksums b/extra/gtk+3/checksums
index 71f2874e..85624b7a 100644
--- a/extra/gtk+3/checksums
+++ b/extra/gtk+3/checksums
@@ -1 +1 @@
-2dac69f716e8d04ba7a95091589e2baaec95dcace932cb15839163db479b1df3  gtk+-3.24.20.tar.xz
+aeea6ae7cd35e83dfc7699be716519faefca346c62e784dd1a37d9df94c08f52  gtk+-3.24.21.tar.xz
diff --git a/extra/gtk+3/sources b/extra/gtk+3/sources
index a824056c..b9b89010 100644
--- a/extra/gtk+3/sources
+++ b/extra/gtk+3/sources
@@ -1 +1 @@
-https://download.gnome.org/sources/gtk+/3.24/gtk+-3.24.20.tar.xz
+https://download.gnome.org/sources/gtk+/3.24/gtk+-3.24.21.tar.xz
diff --git a/extra/gtk+3/version b/extra/gtk+3/version
index b084f653..e2081e54 100644
--- a/extra/gtk+3/version
+++ b/extra/gtk+3/version
@@ -1 +1 @@
-3.24.20 1
+3.24.21 1