diff --git a/README.md b/README.md
index c3b61d4..4d8fc84 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,10 @@ Update 20181119: sync from [webp project of Luciad](https://bitbucket.org/luciad
 
 Update 20190912: update win64 dll to libwebp-1.0.3
 
-Update 20191029: [prankstrisse](https://github.com/prankstrisse) provides osx64 dylib file
+Update 20191029: 
+
+- [prankstrisse](https://github.com/prankstrisse) provides osx64 dylib file
+- remove `x32`  .so/.dll/.dylib file
 
 ## Usage
 
diff --git a/src/main/resources/META-INF/lib/linux_32/libwebp-imageio.so b/src/main/resources/META-INF/lib/linux_32/libwebp-imageio.so
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diff --git a/src/main/resources/META-INF/lib/osx_32/libwebp-imageio.dylib b/src/main/resources/META-INF/lib/osx_32/libwebp-imageio.dylib
deleted file mode 100755
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diff --git a/src/main/resources/META-INF/lib/windows_32/webp-imageio.dll b/src/main/resources/META-INF/lib/windows_32/webp-imageio.dll
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