diff --git a/CHANGES b/CHANGES
index d257d4b677..d023504cb5 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+8.1.0-dev.527 | 2025-09-08 11:02:05 -0700
+
+  * Update src/3rdparty submodule for doctest v2.4.12 and include fix (Tim Wojtulewicz, Corelight)
+
 8.1.0-dev.525 | 2025-09-06 04:26:32 +0000
 
   * CI: Fix warning about ENV usage in CI dockerfiles (Tim Wojtulewicz, Corelight)
diff --git a/VERSION b/VERSION
index 84939f5161..5b0c1de36e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.1.0-dev.525
+8.1.0-dev.527
diff --git a/src/3rdparty b/src/3rdparty
index 22b2618417..9ec6ff9a93 160000
--- a/src/3rdparty
+++ b/src/3rdparty
@@ -1 +1 @@
-Subproject commit 22b2618417bfb587aa9183e1d7774d7fb5023ccf
+Subproject commit 9ec6ff9a931f6783107a8a01d6e3f8c28a14d311