diff --git a/DESCRIPTION b/DESCRIPTION
index 7e9e6ed..a7c042c 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -3,7 +3,7 @@ Title: Read ImageJ Region of Interest (ROI) Files
 Description: Provides functions to read ImageJ (http://imagej.nih.gov/ij/)
     Region of Interest (ROI) files, to plot the ROIs and to convert them as
     spatstat (http://spatstat.org/) spatial patterns.
-Version: 0.1
+Version: 0.1.1
 URL: https://github.com/davidcsterratt/RImageJROI
 Date: 2014-03-20
 Authors@R: c(person("David C", "Sterratt", role=c("aut", "cph", "cre"),
diff --git a/demo/ijroi.R b/demo/ijroi.R
index bc6cc44..1d1a7f1 100644
--- a/demo/ijroi.R
+++ b/demo/ijroi.R
@@ -1,3 +1,4 @@
+library(png)
 path <- file.path(system.file(package = "RImageJROI"), "extdata", "ijroi")
 im <- as.raster(readPNG(file.path(path, "imagej-logo.png")))
 plot(NA, NA, xlim=c(0, ncol(im)), ylim=c(nrow(im), 0), asp=1)