diff --git a/tools/scatterplot/scatterplot.xml b/tools/scatterplot/scatterplot.xml
index e824b769..3fe990ed 100644
--- a/tools/scatterplot/scatterplot.xml
+++ b/tools/scatterplot/scatterplot.xml
@@ -3,6 +3,7 @@
   <requirements>
     <requirement type="package" version="1.9">numpy</requirement>
     <requirement type="package" version="2.8.5">rpy2</requirement>
+    <requirement type="package" version="3.0">libgfortran</requirement>
   </requirements>
   <command><![CDATA[
       python '$__tool_directory__/scatterplot.py'