diff --git a/config.mk b/config.mk
index 4638d5f..55c7262 100644
--- a/config.mk
+++ b/config.mk
@@ -1,4 +1,4 @@
-_VERSION = 0.3.1
+_VERSION = 0.3.1-dev
 VERSION  = `git describe --long --tags --dirty 2>/dev/null || echo $(_VERSION)`
 
 # paths