diff --git a/Makefile b/Makefile
index e8206ac..4137857 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-VERSION = $(shell sed -n '/"version"/s/.*\([0-9]\+\.[0-9]\+\).*/\1/p' manifest.json)
+VERSION = $(shell sed -n '/"version"/s/.*\"\([0-9.]\+\)\",/\1/p' manifest.json)
 SET_VERSION = $(eval CURRENT_VERSION=$(VERSION))
 
 default: v2