diff --git a/CMakeLists.txt b/CMakeLists.txt
index 98a58869..d92fcc85 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED (VERSION 3.2.1)
+CMAKE_MINIMUM_REQUIRED (VERSION 3.1.0)
 
 INCLUDE (CheckIncludeFiles)
 INCLUDE (CheckTypeSize)
diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 17f144fc..3796b918 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -16,7 +16,7 @@ Bug fixes:
    __system_property_get and must use Java calls to retrieve DNS servers.
    [5] [7]
  o win32: Force use of ANSI functions [6]
- o CMake minimum version is now 3.2.1
+ o CMake minimum version is now 3.1
 
 Thanks go to these friendly people for their efforts and contributions: