diff --git a/cups-filters.spec b/cups-filters.spec
index 57dfb21..5e21c83 100644
--- a/cups-filters.spec
+++ b/cups-filters.spec
@@ -55,7 +55,7 @@ BuildRequires: libtool
 Requires: cups-filesystem
 Requires: poppler-utils
 # pstopdf
-Requires: bc
+Requires: bc grep perl sed
 
 # cups-browsed
 Requires(post): systemd