fixes wrong install command

gulyasm · gulyasm · commit 12eae4001d69 · 2018-04-01T12:52:02.000+02:00
diff --git a/README.md b/README.md
@@ -6,7 +6,7 @@
 ![](img/output.gif)
 
 ## Install
-`go get github.com/gulyasm.jsonui`
+`go get -u github.com/gulyasm/jsonui`
 
 ## Usage
 Just use the standard output:
