README.md: small fix

README.md

@@ -9,7 +9,7 @@ This depends on three other packages to work:
   * argparser (>= 0.7.1)
   * DHARMa (>= 0.2.7)
 
-And needs `R >= 3.4.4) to work.
+And needs `R >= 3.4.4` to work.
 
 ## Installation