diff --git a/build-aux/flatpak/org.gnome.Calendar.json b/build-aux/flatpak/org.gnome.Calendar.json
index 1e82710f..edf5f7f1 100644
--- a/build-aux/flatpak/org.gnome.Calendar.json
+++ b/build-aux/flatpak/org.gnome.Calendar.json
@@ -102,8 +102,8 @@
             "sources" : [
                 {
                     "type" : "archive",
-                    "url" : "https://github.com/libical/libical/releases/download/v3.0.10/libical-3.0.10.tar.gz",
-                    "sha256" : "f933b3e6cf9d56a35bb5625e8e4a9c3a50239a85aea05ed842932c1a1dc336b4"
+                    "url" : "https://github.com/libical/libical/releases/download/v3.0.16/libical-3.0.16.tar.gz",
+                    "sha256" : "b44705dd71ca4538c86fb16248483ab4b48978524fb1da5097bd76aa2e0f0c33"
                 }
             ]
         },