diff --git a/README.md b/README.md
index 38a846fb58ce6a620440640ef68598b409b762a0..17f56b6c49c11a84bec7d2cd06755b0ad8b393d2 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ A place to store hints, tips and examples for data cleaning. We use a lot of ver
  * [data.table](https://rdatatable.gitlab.io/data.table/) - very fast data loading and wrangling
  * [lubridate](https://lubridate.tidyverse.org/) - _the_ way to do dates and dateTimes in R
  * [hms](https://hms.tidyverse.org/) - deals with time (HH:MM:SS)
- * [ggplot2](https://ggplot2.tidyverse.org/) - plots, especially using [geom_tile()](https://ggplot2.tidyverse.org/reference/geom_tile.html) with time of day on the date on the x axis, time on the y and 'fill' set to the sensor value that _should_ be there. This shows up non-random (and random) data holes like [these](https://git.soton.ac.uk/SERG/datacleaning/-/blob/master/rmd/cleaningFeederData_files/figure-latex/missingVis-1.pdf) very nicely.
+ * [ggplot2](https://ggplot2.tidyverse.org/) - plots, especially using [geom_tile()](https://ggplot2.tidyverse.org/reference/geom_tile.html) with date on the x axis, time of day on the y and 'fill' set to the sensor value that _should_ be there. This shows up non-random (and random) data holes like [these](https://git.soton.ac.uk/SERG/datacleaning/-/blob/master/rmd/cleaningFeederData_files/figure-latex/missingVis-1.pdf) very nicely.
 
 This repo is an R package. This means: