diff --git a/generate-pdfs.sh b/generate-pdfs.sh
index 4a3d0b7..444aabc 100755
--- a/generate-pdfs.sh
+++ b/generate-pdfs.sh
@@ -37,5 +37,5 @@ fi
 
 for file in slides/**/*.html; do
   slide_name=`echo $file | sed -n -e 's/^slides\/\(.*\)\/index.html/\1/p'`
-  `npm bin`/decktape automatic http://localhost:8000/$file $slide_name.pdf
+  npm exec -- decktape automatic http://localhost:8000/$file $slide_name.pdf
 done