diff --git a/CMakeLists.txt b/CMakeLists.txt
index 76ecaa4..6be510f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.9)
 
 project(fast_float VERSION 0.1.0 LANGUAGES CXX)
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 
diff --git a/README.md b/README.md
index d36de84..d60cc07 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ functions for `float` and `double` types.  These functions convert ASCII strings
 decimal values (e.g., `1.3e10`) into binary types. We provide exact rounding (including
 round to even). In our experience, these `fast_float` functions are faster than any other comparable number-parsing functions. They provide a performance similar to that of the [fast_double_parser](https://github.com/lemire/fast_double_parser) but using an novel algorithm reworked from the ground up, and while offering an API more in line with the expectations of C++ programmers.
 
-Specifically, `fast_float` provides the following two functions with a C++17-like syntax:
+Specifically, `fast_float` provides the following two functions with a C++17-like syntax (the library itself only requires C++11):
 
 ```C++
 from_chars_result from_chars(const char* first, const char* last, float& value, ...);