Use version.md in dev.makefile
diff --git a/dev.makefile b/dev.makefile
index 7e4b3fb..159af17 100644
--- a/dev.makefile
+++ b/dev.makefile
@@ -1,6 +1,6 @@
 # This is only for jsoncpp developers/contributors.
 # We use this to sign releases, generate documentation, etc.
-VER?=$(shell cat version)
+VER?=$(shell cat version.md)
 
 default:
 	@echo "VER=${VER}"