diff --git a/build/makefile/readme.md b/build/makefile/readme.md
index 522ffc71..1b8d9b1b 100644
--- a/build/makefile/readme.md
+++ b/build/makefile/readme.md
@@ -4,7 +4,7 @@ X11, pthread, Xpm, rt, dl, freetype2, Xft, fontconfig, ALSA
 
 Writing a makefile for creating applications with Nana C++ Library
 -------------------
-'''
+```
 GCC	= g++
 NANAPATH = [The folder of Nana C++ Library]
 BIN	= [The bin file what you want to create.]
@@ -29,5 +29,5 @@ $(NANALIB):
 
 clean:
 	rm -f $(LINKOBJ)
-'''
+```
 -------------------