diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0a52daa..adb1bbf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 # The version number.
 set(VERSION_MAJOR 0)
 set(VERSION_MINOR 4)
-set(VERSION_PATCH 2)
+set(VERSION_PATCH 3)
 
 configure_file(
         "caesium/config.h.in"
diff --git a/README.md b/README.md
index 2fdfcae..27644e4 100644
--- a/README.md
+++ b/README.md
@@ -101,7 +101,7 @@ This will compile both the shared and static caesium library, the required heade
 ##### Requirements
 You need basic developer utilities. On Ubuntu you can install them with
 ```bash
-sudo apt-get install libtool autoconf git nasm pkg-config cmake
+sudo apt-get install libtool autoconf git nasm pkg-config cmake libpng-dev
 ```
 Then run `install.sh` to get the latest mozjpeg and zopfli.
 ##### Compile
diff --git a/caesium/jpeg.c b/caesium/jpeg.c
index d20a8b9..5d7647a 100644
--- a/caesium/jpeg.c
+++ b/caesium/jpeg.c
@@ -227,6 +227,7 @@ unsigned char *cs_jpeg_decompress(const char *fileName, cs_jpeg_pars *options)
 		display_error(ERROR, 208);
 	}
 
+	fclose(fp);
 	tjDestroy(tjDecompressHandle);
 	tjFree(sourceJpegBuffer);
 
diff --git a/demo/main.c b/demo/main.c
index f9abacf..9f1a05c 100644
--- a/demo/main.c
+++ b/demo/main.c
@@ -18,5 +18,5 @@ int main(int argc, char *argv[])
 	cs_image_pars options = initialize_parameters();
 	bool result = cs_compress(argv[1], argv[2], &options);
 
-	exit(result);
+	exit(!result);
 }
\ No newline at end of file