diff --git a/tools/rgenetics/rgWebLogo3.xml b/tools/rgenetics/rgWebLogo3.xml
index 33939dae48a..6d65d1363ce 100644
--- a/tools/rgenetics/rgWebLogo3.xml
+++ b/tools/rgenetics/rgWebLogo3.xml
@@ -1,4 +1,5 @@
 <tool id="rgweblogo3" name="Sequence Logo" version="0.4">
+   <requirements><requirement type="package">weblogo</requirement></requirements>
    <description>generator for fasta (eg Clustal alignments)</description>
    <command interpreter="python"> 
     rgWebLogo3.py -F $outformat -s $size -i $input -o $output -t "$logoname" -c "$colours" -U "$units"