diff --git a/Makefile b/Makefile
index 1cb540bf..d7a98d4b 100644
--- a/Makefile
+++ b/Makefile
@@ -15,8 +15,8 @@ VERSION=0.2.0
 # Define the contain of the distribution tarball
 # TODO: Get theses lists from GIT itself.
 HEADER=m-algo.h m-array.h m-atomic.h m-bitset.h m-bptree.h m-buffer.h m-core.h m-deque.h m-dict.h m-genint.h m-i-list.h m-i-shared.h m-list.h m-mempool.h m-mutex.h m-prioqueue.h m-rbtree.h m-shared.h m-snapshot.h m-string.h m-tuple.h m-variant.h m-worker.h
-DOC1=depend.png LICENSE README.md
-DOC2=doc/API.txt doc/Container.html  doc/Container.ods doc/DEV.md doc/ISSUES.org
+DOC1=LICENSE README.md
+DOC2=doc/API.txt doc/Container.html  doc/Container.ods doc/DEV.md doc/ISSUES.org doc/depend.png doc/oplist.png
 EXAMPLE=example/ex-array01.c  example/ex-array04.c   example/ex-dict02.c  example/ex-grep01.c  example/ex-multi01.c  example/ex-rbtree01.c example/ex-array02.c  example/ex-buffer01.c  example/ex-dict03.c  example/ex-list01.c  example/ex-multi02.c  example/Makefile example/ex-array03.c  example/ex-dict01.c    example/ex-dict04.c  example/ex-mph.c     example/ex-multi03.c
 TEST=tests/coverage.h tests/test-malgo.c tests/test-mbptree.c tests/test-mdeque.c tests/test-milist.c    tests/test-mmutex.c      tests/test-mshared.c    tests/test-mtuple.c    tests/test-obj.h     tests/tgen-mdict.c    tests/tgen-openmp.c  tests/wip-mregister.c tests/dict.txt    tests/test-marray.c   tests/test-mbuffer.c  tests/test-mdict.c    tests/test-mlist.c     tests/test-mprioqueue.c  tests/test-msnapshot.c  tests/test-mvariant.c  tests/tgen-bitset.c  tests/tgen-mlist.c    tests/tgen-queue.c tests/Makefile    tests/test-mbitset.c  tests/test-mcore.c    tests/test-mgenint.c  tests/test-mmempool.c  tests/test-mrbtree.c     tests/test-mstring.c    tests/test-mworker.c   tests/tgen-marray.c  tests/tgen-mstring.c  tests/tgen-shared.c
 
@@ -32,7 +32,7 @@ check:
 	cd example && $(MAKE) all
 
 html:	doc
-doc:	README.md depend.png
+doc:	README.md doc/depend.png
 	markdown < README.md > README.html
 
 clean:
@@ -49,10 +49,10 @@ distclean: clean
 depend:
 	cd tests && $(MAKE) depend
 
-depend.png: $(HEADER)
+doc/depend.png: $(HEADER)
 	(echo "digraph g { " ; for i in *.h ; do list=$$(grep "include \"" $$i |cut -f2 -d\") ; for j in $$list ; do echo "\"$$i\" -> \"$$j\" ;" ; done ; done ; echo "}" )> depend.dot
-	dot -Tpng depend.dot -o depend.png
-	optipng -o7 depend.png
+	dot -Tpng depend.dot -o doc/depend.png
+	optipng -o7 doc/depend.png
 
 dist: $(HEADER) $(DOC1) $(DOC2) $(EXAMPLE) $(TEST) Makefile clean
 	$(MKDIR) '$(PACKAGE)'
diff --git a/README.md b/README.md
index ecf7d5df..d1d03599 100644
--- a/README.md
+++ b/README.md
@@ -123,7 +123,7 @@ In some rare case, the method has to be adapted to the container.
 
 Each header can be used separately from others: dependency between headers have been kept to the minimum.
 
-![Dependence between headers](https://raw.githubusercontent.com/P-p-H-d/mlib/master/depend.png)
+![Dependence between headers](https://raw.githubusercontent.com/P-p-H-d/mlib/master/doc/depend.png)
 
 Build & Installation
 --------------------
diff --git a/depend.png b/depend.png
deleted file mode 100644
index 6c2539c4..00000000
Binary files a/depend.png and /dev/null differ
diff --git a/doc/depend.png b/doc/depend.png
new file mode 100644
index 00000000..3b2d2332
Binary files /dev/null and b/doc/depend.png differ