diff --git a/.scalafmt.conf b/.scalafmt.conf
index 866ffc284..c9dd647d2 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -1,7 +1,7 @@
 version = 2.0.0-RC5
 maxColumn = 100
 project.git = true
-project.excludeFilters = [ /sbt-test/, /input_sources/, /contraband-scala/ ]
+project.excludeFilters = [ "\\Wsbt-test\\W", "\\Winput_sources\\W", "\\Wcontraband-scala\\W" ]
 
 # http://docs.scala-lang.org/style/scaladoc.html recommends the JavaDoc style.
 # scala/scala is written that way too https://github.com/scala/scala/blob/v2.12.2/src/library/scala/Predef.scala