diff --git a/tool/build-pdf b/tool/build-pdf
index 30faf92..9bc8d64 100755
--- a/tool/build-pdf
+++ b/tool/build-pdf
@@ -1,3 +1,3 @@
 #!/bin/bash
 
-prince build/gobyexample.html -o build/gobyexample.pdf
+exec prince build/gobyexample.html -o build/gobyexample.pdf