diff --git a/Makefile b/Makefile
index 3c52347..7d32034 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 fullversion := $(shell grep -m 1 'ThisBuild / version :=' ./version.sbt | perl -pe 's/^ThisBuild \/ version := "([0-9]+\.[0-9]+\.[0-9]+).*$$/$$1/g')
 
-version := $(shell grep -m 1 'ThisBuild / version :=' ./version.sbt | perl -pe 's/^ThisBuild \/ version := "([0-9]+\.[0-9+]).*$$/$$1/g')
+version := $(shell grep -m 1 'ThisBuild / version :=' ./version.sbt | perl -pe 's/^ThisBuild \/ version := "([0-9]+\.[0-9]+).*$$/$$1/g')
 
 .phony: print-version print-fullversion
 print-version: