diff --git a/2012/hamano/Makefile b/2012/hamano/Makefile
index b4f90df6f..3e80f4f80 100644
--- a/2012/hamano/Makefile
+++ b/2012/hamano/Makefile
@@ -103,8 +103,8 @@ CINCLUDE=
 #CINCLUDE= -include stdlib.h
 #CINCLUDE= -include stdio.h
 #CINCLUDE= -include stdlib.h -include stdio.h
-#CINCLUDE= -I ${X11_INCDIR}
-#CINCLUDE= -I ${HOMEBREW_PREFIX}/include/SDL2
+#CINCLUDE= -I ${X11_INCDIR} -I ${X11_INCDIR}/X11
+#CINCLUDE= `${SDL2_CONFIG} --cflags`
 
 # Optimization
 #
@@ -128,7 +128,7 @@ CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT}
 LIBS=
 #LIBS= -lm
 #LIBS= -L ${X11_LIBDIR} -lX11
-#LIBS= -L ${HOMEBREW_PREFIX}/lib -lSDL2
+#LIBS= `${SDL2_CONFIG} --libs`
 
 # C compiler to use
 #
@@ -142,7 +142,7 @@ ifeq ($(CC),clang)
 #
 CSILENCE+= -Wno-comma -Wno-double-promotion -Wno-missing-prototypes \
 	-Wno-missing-variable-declarations -Wno-poison-system-directories \
-	-Wno-shadow -Wno-shorten-64-to-3
+	-Wno-shadow -Wno-shorten-64-to-32
 #
 CWARN+= -Weverything
 #
@@ -327,4 +327,3 @@ pluto: charon
 	@echo "dwarf is a type of planet"
 	@echo "therefore, $@ is a planet"
 	@echo "having lots of planets is good feature because supernovae can help ${MAKE} a lot of them"
-
diff --git a/2012/hamano/README.md b/2012/hamano/README.md
index c6416215e..dec6736cd 100644
--- a/2012/hamano/README.md
+++ b/2012/hamano/README.md
@@ -1,34 +1,43 @@
 # Most elementary use of C - Silver award
 
-Tsukasa Hamano  
-<hamano@cuspy.org>  
+    Tsukasa Hamano  
+    <hamano@cuspy.org>  
 
-## To build:
+# To build:
 
-        make all
+```sh
+make
+```
 
 ### To run:
 
-    ./hamano < textfile > output.pdf
+```sh
+./hamano < textfile > output.pdf
+```
 
 ### Try:
 
-    ./hamano < README.md > hint.pdf
+```sh
+./hamano < README.md > hint.pdf
+```
 
-    # You can read output.pdf with PDF reader
-    acroread hint.pdf
-    # or
-    evince hint.pdf
+You can read output.pdf with PDF reader acroread hint.pdf or evince hint.pdf.
 
-    # deobfuscate
-    gcc -xc hint.pdf -o hint
-    ./hint
+To deobfuscate:
 
-    # Of course, You can obfuscate c code
-    echo 'void main(){puts("Hello World!");}' | ./hamano > hello.pdf
-    gcc -xc hello.pdf -o hello2
-    ./hello2 | gcc -xc - -o ./hello3
-    ./hello3
+```sh
+cc -xc hint.pdf -o hint
+./hint
+```
+
+Of course, You can also obfuscate c code:
+
+```sh
+echo 'void main(){puts("Hello World!");}' | ./hamano > hello.pdf
+cc -xc hello.pdf -o hello2
+./hello2 | gcc -xc - -o ./hello3
+./hello3
+```
 
 ## Judges' comments
 
@@ -71,20 +80,20 @@ available to compile as C code.
 I've been tested with GCC 4.7 and Clang 3.0 on Linux, and following
 PDF Reader:
 
- * Adobe Acrobat Reader
- * Evince
- * Ghostscript
- * Xpdf
+    * Adobe Acrobat Reader
+    * Evince
+    * Ghostscript
+    * Xpdf
 
 ### Obfuscations
+
 This program is obfuscated by using classical methods.
 But can you find out the embedded font from fragmented glyph?
 
---------------------------------------------------------------------------------
-<!--
+## Copyright:
+
 (c) Copyright 1984-2015, [Leo Broukhis, Simon Cooper, Landon Curt Noll][judges] - All rights reserved
 This work is licensed under a [Creative Commons Attribution-ShareAlike 3.0 Unported License][cc].
 
 [judges]: http://www.ioccc.org/judges.html
 [cc]: http://creativecommons.org/licenses/by-sa/3.0/
--->