diff --git a/songbook b/songbook
index f4850774..bba8cbdf 100755
--- a/songbook
+++ b/songbook
@@ -3,4 +3,8 @@
 # Do not edit this file. This file is just a helper file for development test.
 # It is not part of the distributed software.
 
-python -m patacrep.songbook $*
+if [ $1 = "purgecache" ]; then
+    find . -name ".cache" -type d -print -exec rm -r {} +
+else
+    python -m patacrep.songbook $*
+fi