diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9ad3340..371946f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,5 +74,5 @@ install(TARGETS ${RSE_TERRAIN_TARGETS_LIST}
 # Install library includes
 install(FILES ${RSP_PUBLIC_HRDS} DESTINATION ${INSTALL_INC_DIR})
 # Install dependancies
-install(FILES ${PROJECT_BINARY_DIR}/bin/glew32.dll ${PROJECT_BINARY_DIR}/bin/libpng16.dll ${PROJECT_BINARY_DIR}/bin/zlib1.dll 
+install(FILES ${PROJECT_BINARY_DIR}/bin/glew32.dll ${PROJECT_BINARY_DIR}/bin/libpng16.dll
 		DESTINATION ${INSTALL_BIN_DIR})
diff --git a/Jenkinsfile b/Jenkinsfile
index 28b1eab..3060123 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -5,7 +5,7 @@ pipeline {
 	}
 	environment {
 		CI_OUTPUT_NAME	= "RSETerrain"
-		CI_VERSION		= "2.0.0"
+		CI_VERSION		= "2.0.3"
 		CI_BUILD_NUMBER	= "$BUILD_NUMBER"
 	}
 	stages {
diff --git a/LICENSE-zlib b/LICENSE-zlib
deleted file mode 100644
index 1375708..0000000
--- a/LICENSE-zlib
+++ /dev/null
@@ -1,21 +0,0 @@
-
-  Copyright (C) 1995-2022 Jean-loup Gailly and Mark Adler
-
-  This software is provided 'as-is', without any express or implied
-  warranty.  In no event will the authors be held liable for any damages
-  arising from the use of this software.
-
-  Permission is granted to anyone to use this software for any purpose,
-  including commercial applications, and to alter it and redistribute it
-  freely, subject to the following restrictions:
-
-  1. The origin of this software must not be misrepresented; you must not
-     claim that you wrote the original software. If you use this software
-     in a product, an acknowledgment in the product documentation would be
-     appreciated but is not required.
-  2. Altered source versions must be plainly marked as such, and must not be
-     misrepresented as being the original software.
-  3. This notice may not be removed or altered from any source distribution.
-
-  Jean-loup Gailly        Mark Adler
-  jloup@gzip.org          madler@alumni.caltech.edu
\ No newline at end of file
diff --git a/README.md b/README.md
index 8d8edcc..3da2195 100644
--- a/README.md
+++ b/README.md
@@ -43,12 +43,13 @@ Due to issue with copyrights, I can't provide samples... You need to extract HOB
 
 ### Dependencies
 
+- libpng (1.6.37)
 - obj-lib: as obj file exporter. (https://git.jcsmith.fr/jackcartersmith/obj)
 
 ### Compiling
 
 You can compile on both Windows (MinGW) or native Linux system thanks to CMake, you only need to adjust your dependencies on Windows or use Conan packages manager (https://conan.io).
-zlib-dev (zlib1g-dev) and libpng16-dev distrib packages can be used on debian/ubuntu.
+libpng16-dev distrib package can be used on debian/ubuntu.
 
 To compile, just clone (**don't forget git submodules**) and launch cmake: 
 
diff --git a/RSETerrain/CMakeLists.txt b/RSETerrain/CMakeLists.txt
index 9111e16..057ac51 100644
--- a/RSETerrain/CMakeLists.txt
+++ b/RSETerrain/CMakeLists.txt
@@ -13,8 +13,6 @@ include(CheckCSourceCompiles)
 add_definitions(-DCONF_NO_GL)	# Used for obj-lib to not compile GL part
 
 # Import needed packages and references their include path
-find_package(ZLIB 1.2.12 REQUIRED)
-include_directories(${ZLIB_INCLUDE_DIR})
 find_package(PNG 1.6.37 REQUIRED)
 include_directories(${PNG_INCLUDE_DIR})
 #find_package(GLEW REQUIRED)				# Enable when GL rendering is ready
@@ -43,7 +41,7 @@ set_target_properties(rse-terrain PROPERTIES OUTPUT_NAME ${RSE_TERRAIN_NAME})
 if(MSVC)
 	# msvc does not append 'lib' - do it here to have consistent name
 	set_target_properties(rse-terrain PROPERTIES IMPORT_PREFIX "lib")
-	target_link_libraries(rse-terrain PRIVATE rsp-terrain-libstatic ${ZLIB_LIBRARIES} ${PNG_LIBRARIES} ${GLEW_LIBRARIES})
+	target_link_libraries(rse-terrain PRIVATE rsp-terrain-libstatic ${PNG_LIBRARIES} ${GLEW_LIBRARIES})
 else()
-	target_link_libraries(rse-terrain PRIVATE rsp-terrain-libstatic ${ZLIB_LIBRARIES} ${PNG_LIBRARIES} ${GLEW_LIBRARIES} m)
+	target_link_libraries(rse-terrain PRIVATE rsp-terrain-libstatic ${PNG_LIBRARIES} ${GLEW_LIBRARIES} m)
 endif()
diff --git a/RSETerrain/src/RSETerrain.c b/RSETerrain/src/RSETerrain.c
index a344d72..fffb4f0 100644
--- a/RSETerrain/src/RSETerrain.c
+++ b/RSETerrain/src/RSETerrain.c
@@ -3,7 +3,7 @@
  * @date		23/08/2022
  * @author		JackCarterSmith
  * @copyright	GPL-v3.0
- * @brief		HMP model parser and export to Waveform OBJ format and grey-scale PNG heightmap.
+ * @brief		HMP terrain parser and export to Waveform OBJ format and grey-scale PNG heightmap.
  *
  */
 
diff --git a/RSETerrain/src/terrain_export.c b/RSETerrain/src/terrain_export.c
index cb3734b..5e766e3 100644
--- a/RSETerrain/src/terrain_export.c
+++ b/RSETerrain/src/terrain_export.c
@@ -10,11 +10,11 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <zlib.h>
+#include <png.h>
 #include "options.h"
 #include <RSPTerrain_datatypes.h>
 #include <RSPTerrain_errordefs.h>
-#include <zlib.h>
-#include <png.h>
 #include "obj/obj.h"
 #include "terrain_export.h"
 
@@ -58,18 +58,27 @@ unsigned char exportHeightmapPNG(const T_RSPTERRAIN_HEIGHTMAP* heightmap, const
 		return RSPLIB_ERROR_MEMORY;
 	}
 
+	// Set compression level
+	png_set_compression_level(png_ptr, Z_BEST_COMPRESSION);
+
 	// Set image attributes
-	png_set_IHDR(png_ptr, info_ptr, heightmap->width * RSPTERRAINLIB_TILE_SAMPLING, heightmap->height * RSPTERRAINLIB_TILE_SAMPLING, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
+	png_set_IHDR(png_ptr, info_ptr,
+			heightmap->width * RSPTERRAINLIB_TILE_SAMPLING,
+			heightmap->height * RSPTERRAINLIB_TILE_SAMPLING,
+			8,
+			PNG_COLOR_TYPE_GRAY,
+			PNG_INTERLACE_NONE,
+			PNG_COMPRESSION_TYPE_DEFAULT,
+			PNG_FILTER_TYPE_DEFAULT
+		);
 
 	// Store PNG datas in buffer
 	row_ptrs = png_malloc(png_ptr, heightmap->height * RSPTERRAINLIB_TILE_SAMPLING * sizeof(png_byte *));
 	for ( z = 0; z < heightmap->height * RSPTERRAINLIB_TILE_SAMPLING; z++ ) {
-		png_byte *row = png_malloc(png_ptr, heightmap->width * RSPTERRAINLIB_TILE_SAMPLING * sizeof(unsigned char) * 3);
+		png_byte *row = png_malloc(png_ptr, heightmap->width * RSPTERRAINLIB_TILE_SAMPLING * sizeof(unsigned char));
 		row_ptrs[z] = row;
 		for ( x = 0; x < heightmap->width * RSPTERRAINLIB_TILE_SAMPLING; x++ ) {
 			*row++ = heightmap->heightmap[x][z];
-			*row++ = heightmap->heightmap[x][z];
-			*row++ = heightmap->heightmap[x][z];
 		}
 	}
 
diff --git a/RSPTerrainLib/src/RSPTerrain.c b/RSPTerrainLib/src/RSPTerrain.c
index c9f6465..578f51a 100644
--- a/RSPTerrainLib/src/RSPTerrain.c
+++ b/RSPTerrainLib/src/RSPTerrain.c
@@ -22,7 +22,6 @@ char* RSPTerrain_getVersion( void ) {
 	return PRG_VERSION;
 }
 
-
 unsigned short RSPTerrain_processHMPFile( T_RSPTERRAIN_HMP* hmpStruct, const char* const filePath,
 		const RSPTERRAIN_PARAMETERS params ) {
 
diff --git a/conanfile.txt b/conanfile.txt
index 1786eae..5c5c19e 100644
--- a/conanfile.txt
+++ b/conanfile.txt
@@ -8,7 +8,6 @@ cmake
 cmake_find_package
 
 [options]
-zlib:shared=True
 libpng:shared=True
 glew:shared=True