diff --git a/packrat/packrat.lock b/packrat/packrat.lock
index 72dcfa1..037708f 100644
--- a/packrat/packrat.lock
+++ b/packrat/packrat.lock
@@ -806,8 +806,8 @@ Hash: 709a3da4deef928ab299f4ff52caf66b
 
 Package: xfun
 Source: CRAN
-Version: 0.13
-Hash: 27ad2c3d9cc614cfb92e1bb51b62f5f6
+Version: 0.15
+Hash: cd6e03b0392374cf89622e8468854ff3
 
 Package: xml2
 Source: CRAN
diff --git a/packrat/src/xfun/xfun_0.13.tar.gz b/packrat/src/xfun/xfun_0.13.tar.gz
deleted file mode 100644
index 76f546d..0000000
Binary files a/packrat/src/xfun/xfun_0.13.tar.gz and /dev/null differ
diff --git a/packrat/src/xfun/xfun_0.15.tar.gz b/packrat/src/xfun/xfun_0.15.tar.gz
new file mode 100644
index 0000000..7987ebb
Binary files /dev/null and b/packrat/src/xfun/xfun_0.15.tar.gz differ