diff --git a/CMakeLists.txt b/CMakeLists.txt
index f648f2299..efe3cab65 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,7 +16,9 @@
 #   mbedtls, mbedx509, mbedcrypto and apidoc targets.
 #
 
-cmake_minimum_required(VERSION 2.8.12)
+# We specify a minimum requirement of 3.10.2, but for now use 3.5.1 here
+# until our infrastructure catches up.
+cmake_minimum_required(VERSION 3.5.1)
 
 # https://cmake.org/cmake/help/latest/policy/CMP0011.html
 # Setting this policy is required in CMake >= 3.18.0, otherwise a warning is generated. The OLD