diff --git a/toonz/sources/image/CMakeLists.txt b/toonz/sources/image/CMakeLists.txt
index c5fa3d3..9e4c63a 100644
--- a/toonz/sources/image/CMakeLists.txt
+++ b/toonz/sources/image/CMakeLists.txt
@@ -79,7 +79,7 @@ include_directories(
     ${TIFF_INCLUDE_DIR}
     ${SDKROOT}/LibJPEG/jpeg-9)
 if (WIN32)
-    include_directories(${SDKROOT}/libpng-1.6.32)
+    include_directories(${SDKROOT}/libpng-1.6.21)
     if(PLATFORM EQUAL 32)
         include_directories(${SDKROOT}/quicktime/QT73SDK/CIncludes)
     endif()