diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 3d7e852..1fab56c 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -27,36 +27,36 @@ if (BUILD_SHARED_LIBS)
 endif()
 
 if (GIF_LIBRARIES)
-    target_include_directories  (leptonica PUBLIC ${GIF_INCLUDE_DIR})
-    target_link_libraries       (leptonica ${GIF_LIBRARIES})
+    target_include_directories  (leptonica PRIVATE ${GIF_INCLUDE_DIR})
+    target_link_libraries       (leptonica PRIVATE ${GIF_LIBRARIES})
 endif()
 if (JPEG_LIBRARIES)
-    target_include_directories  (leptonica PUBLIC ${JPEG_INCLUDE_DIR})
-    target_link_libraries       (leptonica ${JPEG_LIBRARIES})
+    target_include_directories  (leptonica PRIVATE ${JPEG_INCLUDE_DIR})
+    target_link_libraries       (leptonica PRIVATE ${JPEG_LIBRARIES})
 endif()
 if (JP2K_FOUND)
-    target_include_directories  (leptonica PUBLIC ${JP2K_INCLUDE_DIRS})
-    target_link_libraries       (leptonica ${JP2K_LINK_LIBRARIES})
+    target_include_directories  (leptonica PRIVATE ${JP2K_INCLUDE_DIRS})
+    target_link_libraries       (leptonica PRIVATE ${JP2K_LINK_LIBRARIES})
 endif()
 if (PNG_LIBRARIES)
-    target_include_directories  (leptonica PUBLIC ${PNG_INCLUDE_DIRS})
-    target_link_libraries       (leptonica ${PNG_LIBRARIES})
+    target_include_directories  (leptonica PRIVATE ${PNG_INCLUDE_DIRS})
+    target_link_libraries       (leptonica PRIVATE ${PNG_LIBRARIES})
 endif()
 if (TIFF_LIBRARIES)
-    target_include_directories  (leptonica PUBLIC ${TIFF_INCLUDE_DIR})
-    target_link_libraries       (leptonica ${TIFF_LIBRARIES})
+    target_include_directories  (leptonica PRIVATE ${TIFF_INCLUDE_DIR})
+    target_link_libraries       (leptonica PRIVATE ${TIFF_LIBRARIES})
 endif()
 if (WEBP_FOUND)
-    target_include_directories  (leptonica PUBLIC ${WEBP_INCLUDE_DIRS})
-    target_link_libraries       (leptonica ${WEBP_LIBRARIES})
+    target_include_directories  (leptonica PRIVATE ${WEBP_INCLUDE_DIRS})
+    target_link_libraries       (leptonica PRIVATE ${WEBP_LIBRARIES})
 endif()
 if (ZLIB_LIBRARIES)
-    target_include_directories  (leptonica PUBLIC ${ZLIB_INCLUDE_DIRS})
-    target_link_libraries       (leptonica ${ZLIB_LIBRARIES})
+    target_include_directories  (leptonica PRIVATE ${ZLIB_INCLUDE_DIRS})
+    target_link_libraries       (leptonica PRIVATE ${ZLIB_LIBRARIES})
 endif()
 
 if (UNIX)
-    target_link_libraries       (leptonica m)
+    target_link_libraries       (leptonica PRIVATE m)
     set(lib ${CMAKE_SHARED_LIBRARY_PREFIX})
     set(dll ${CMAKE_SHARED_LIBRARY_SUFFIX})
     set(old_target ${lib}lept${dll})
@@ -72,7 +72,7 @@ endif()
 if (NOT SW_BUILD)
     export(TARGETS leptonica FILE ${CMAKE_BINARY_DIR}/LeptonicaTargets.cmake)
 else()
-    target_link_libraries       (leptonica
+    target_link_libraries       (leptonica PRIVATE
         org.sw.demo.gif
         org.sw.demo.jpeg
         org.sw.demo.glennrp.png