diff --git a/workflows/clustering_kmeans.R b/workflows/clustering_kmeans.R
index f9de34f66528bb414a1eefb82c884a352440bb25..7563cf64363cc78b3ef85bea5aeae735fe9391c4 100644
--- a/workflows/clustering_kmeans.R
+++ b/workflows/clustering_kmeans.R
@@ -1,5 +1,6 @@
 library(RColorBrewer)
 library(gridExtra)
+library(ggplot2)
 
 # We've looked at a couple of clustering methods already (PCA, Hierarchical)
 # Now we'll look at k-means.