diff --git a/build-aux/flatpak/org.gnome.Calendar.json b/build-aux/flatpak/org.gnome.Calendar.json
index 500ccdd7..0a52459a 100644
--- a/build-aux/flatpak/org.gnome.Calendar.json
+++ b/build-aux/flatpak/org.gnome.Calendar.json
@@ -77,8 +77,8 @@
             "sources" : [
                 {
                     "type" : "archive",
-                    "url" : "https://github.com/libical/libical/releases/download/v3.0.1/libical-3.0.1.tar.gz",
-                    "sha256" : "7f32a889df542592a357a73ff5f3bd7b5058450c1a3fb272b1c9a69e32d9ed10"
+                    "url" : "https://github.com/libical/libical/releases/download/v3.0.5/libical-3.0.5.tar.gz",
+                    "sha256" : "7ad550c8c49c9b9983658e3ab3e68b1eee2439ec17b169a6b1e6ecb5274e78e6"
                 }
             ]
         },