diff --git a/README.md b/README.md
index e42de61..9e67228 100644
--- a/README.md
+++ b/README.md
@@ -192,7 +192,9 @@ Output:
 
 ## Requirements
 
- - A C++ compiler with decent C++11 support. Currently only tested with GCC 4.9.
+ - A C++ compiler with decent C++11 support. Currently tested with:
+   - GCC 4.7, 4.8, 4.9
+   - clang 3.4
  - Boost 1.54+ for [Boost.Variant](http://www.boost.org/doc/libs/1_57_0/doc/html/variant.html)
  - CMake 2.8+ for building