diff --git a/README.md b/README.md
index 8f164a5..dcef032 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Compilation
 ===========
 
 You will need `bison` version >= 3.0 (Bison 2.5 works but requires manual intervention),
-`flex` >= 2.5, `LLVM` >= 3.5, `Boost` >= 1.48, `YAML-cpp` >= 0.3 and any C++11 compiler.
+`flex` >= 2.5, `LLVM` >= 3.5, `Boost` >= 1.48, `YAML-cpp` >= 0.5 and any C++11 compiler.
 The build scripts are generated using CMake, version >= 2.8.
 
 A typical Makefile-based build workflow would be: