diff --git a/changelog.d/3903.misc b/changelog.d/3903.misc
new file mode 100644
index 0000000000000000000000000000000000000000..49b64bf33355e1a71b8127bd4b323e4c0876822c
--- /dev/null
+++ b/changelog.d/3903.misc
@@ -0,0 +1 @@
+Increase the timeout when filling missing events in federation requests
\ No newline at end of file