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@@ -106,6 +106,7 @@ Crawl gladly and gratuitously uses the following open source packages:
* The Mersenne Twister for random number generation, docs/mt19937.txt.
* The SQLite library as database engine; it is properly public domain.
* The SDL and SDL_image libraries under the LGPL 2.1 license: docs/lgpl.txt.
+* The libpng library, see docs/libpng-LICENSE.txt
5. How you can help