diff --git a/CMakeLists.txt b/CMakeLists.txt
index f4c3ae5d1..aff9bbf2b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,5 @@
 cmake_minimum_required(VERSION 3.15 FATAL_ERROR)
-# Allow target_link_libraries with targets in other directories
-cmake_policy(SET CMP0079 NEW)
-# Set MSVC runtime library flags from CMAKE_MSVC_RUNTIME_LIBRARY
-cmake_policy(SET CMP0091 NEW)
+cmake_policy(VERSION 3.15...3.20)
 
 # obtain revision info from git
 find_package(Git)
diff --git a/hecl b/hecl
index a84fee775..4376f02e1 160000
--- a/hecl
+++ b/hecl
@@ -1 +1 @@
-Subproject commit a84fee77538a40cf49b74292e2631bed717a0ede
+Subproject commit 4376f02e1a306cbfb99a8f1f01484696a8f1930f