diff --git a/CHANGES b/CHANGES
index bbf4a4e4db..52b9408970 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+8.1.0-dev.522 | 2025-09-05 19:52:31 -0700
+
+  * Bump zeek-client to pull in more resilient controller I/O (Christian Kreibich, Corelight)
+
 8.1.0-dev.520 | 2025-09-05 12:56:24 -0700
 
   * Bump auxil/spicy to latest development snapshot (Benjamin Bannier, Corelight)
diff --git a/VERSION b/VERSION
index 3944bc1be5..a7bfb0589b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.1.0-dev.520
+8.1.0-dev.522
diff --git a/auxil/zeek-client b/auxil/zeek-client
index 62e91d3abc..16849ca3ec 160000
--- a/auxil/zeek-client
+++ b/auxil/zeek-client
@@ -1 +1 @@
-Subproject commit 62e91d3abc726c3c17be4d70bb222b29b7bb6476
+Subproject commit 16849ca3ec2f8637e3f8ef8ee27e2c279724387f