diff --git a/serving/external/exprtk b/serving/external/exprtk
index b0bc24cfd..f46bffcd6 160000
--- a/serving/external/exprtk
+++ b/serving/external/exprtk
@@ -1 +1 @@
-Subproject commit b0bc24cfdda39b30145b1f6c2c84b801cd131fef
+Subproject commit f46bffcd6966d38a09023fb37ba9335214c9b959