diff --git a/install-cow.sh b/install-cow.sh
index 84a4dde..69401f8 100755
--- a/install-cow.sh
+++ b/install-cow.sh
@@ -83,7 +83,7 @@ fi
 bin=cow-$os$arch-$version
 tmpdir=`mktemp -d /tmp/cow.XXXXXX`
 tmpbin=$tmpdir/cow
-binary_url="http://dl.chenyufei.info/cow/$bin.gz"
+binary_url="http://dl.chenyufei.info/cow/$version/$bin.gz"
 echo "Downloading cow binary $binary_url to $tmpbin.gz"
 curl -L "$binary_url" -o $tmpbin.gz || \
     exit_on_fail "Downloading cow binary failed"