diff --git a/lib/webmagic-core-0.5.1.jar b/lib/webmagic-core-0.5.1.jar
deleted file mode 100644
index ce9385a..0000000
Binary files a/lib/webmagic-core-0.5.1.jar and /dev/null differ
diff --git a/lib/webmagic-extension-0.5.1.jar b/lib/webmagic-extension-0.5.1.jar
deleted file mode 100644
index 982259f..0000000
Binary files a/lib/webmagic-extension-0.5.1.jar and /dev/null differ
diff --git a/lib/xsoup-0.2.2.jar b/lib/xsoup-0.2.2.jar
deleted file mode 100644
index 0b13d80..0000000
Binary files a/lib/xsoup-0.2.2.jar and /dev/null differ
diff --git a/make.sh b/make.sh
index e8e7a74..0444c18 100644
--- a/make.sh
+++ b/make.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
-mvn dependency:copy-dependencies -DoutputDirectory=target/lib
+mvn clean dependency:copy-dependencies -DoutputDirectory=target/lib
 rsync -avz --delete ./webmagic-samples/target/lib/ ./lib/