diff --git a/fwlite-tool-conf.spec b/fwlite-tool-conf.spec
index 9e19ea76b90..9e7d75e37b0 100644
--- a/fwlite-tool-conf.spec
+++ b/fwlite-tool-conf.spec
@@ -20,6 +20,7 @@ Requires: gdbm
 Requires: gmake
 Requires: gsl
 Requires: hepmc
+Requires: hepmc3
 Requires: hls
 Requires: libjpeg-turbo
 Requires: libpng