diff --git a/requirements.txt b/requirements.txt
index c097b5f..2fad8f6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,4 +8,5 @@ pelican==3.6.3
 pelican-minify==0.9
 pyembed-markdown==1.1.0
 python-resize-image==1.1.3
+pyyaml==3.12
 sh==1.11