diff --git a/fbpcs/emp_games/lift/common/LiftMetrics.cpp b/fbpcs/emp_games/lift/common/LiftMetrics.cpp
index 00f72527d..3bf079662 100644
--- a/fbpcs/emp_games/lift/common/LiftMetrics.cpp
+++ b/fbpcs/emp_games/lift/common/LiftMetrics.cpp
@@ -138,9 +138,9 @@ LiftMetrics LiftMetrics::fromJson(const std::string& str) {
 
 folly::dynamic LiftMetrics::toDynamic() const {
   auto testConvHistogramDynamic =
-      folly::dynamic(testConvHistogram.begin(), testConvHistogram.end());
+      folly::dynamic::array_range(testConvHistogram);
   auto controlConvHistogramDynamic =
-      folly::dynamic(controlConvHistogram.begin(), controlConvHistogram.end());
+      folly::dynamic::array_range(controlConvHistogram);
 
   return folly::dynamic::object("testConversions", testConversions)(
       "controlConversions", controlConversions)(