diff --git a/Makefile b/Makefile
index cd8c1ea6..989e549b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-SPEC_GENERATOR_VER=1.4.0
+SPEC_GENERATOR_VER=1.5.0
 
 .PHONY: install