diff --git a/03_GettingData/02_02_readingHDF5/index.Rmd b/03_GettingData/02_02_readingHDF5/index.Rmd
index b1740bf30..1816d3da0 100644
--- a/03_GettingData/02_02_readingHDF5/index.Rmd
+++ b/03_GettingData/02_02_readingHDF5/index.Rmd
@@ -36,7 +36,7 @@ knit_hooks$set(plot = knitr:::hook_plot_html)
 
 * Used for storing large data sets
 * Supports storing a range of data types
-* Heirarchical data format
+* Hierarchical data format
 * _groups_ containing zero or more data sets and metadata
   * Have a _group header_ with group name and list of attributes
   * Have a _group symbol table_ with a list of objects in group
@@ -134,4 +134,4 @@ h5read("example.h5","foo/A")
 * hdf5 can be used to optimize reading/writing from disc in R
 * The rhdf5 tutorial: 
   * [http://www.bioconductor.org/packages/release/bioc/vignettes/rhdf5/inst/doc/rhdf5.pdf](http://www.bioconductor.org/packages/release/bioc/vignettes/rhdf5/inst/doc/rhdf5.pdf)
-* The HDF group has informaton on HDF5 in general [http://www.hdfgroup.org/HDF5/](http://www.hdfgroup.org/HDF5/)
\ No newline at end of file
+* The HDF group has informaton on HDF5 in general [http://www.hdfgroup.org/HDF5/](http://www.hdfgroup.org/HDF5/)