diff --git a/project/plugins.sbt b/project/plugins.sbt
index 64466e7..3757f26 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -5,4 +5,4 @@ addSbtPlugin("org.scoverage"            %   "sbt-scoverage"               % "1.5
 addSbtPlugin("org.scoverage"            %   "sbt-coveralls"               % "1.2.2")
 addSbtPlugin("org.scalastyle"           %%  "scalastyle-sbt-plugin"       % "1.0.0")
 addSbtPlugin("com.lucidchart"           %   "sbt-scalafmt"                % "1.15")
-addSbtPlugin("ch.epfl.scala"            %%  "sbt-scalafix"                % "0.5.7")
+addSbtPlugin("ch.epfl.scala"            %%  "sbt-scalafix"                % "0.5.10")
diff --git a/src/main/scala/com/gu/tip/Configuration.scala b/src/main/scala/com/gu/tip/Configuration.scala
index 69cb5cd..1ac6827 100644
--- a/src/main/scala/com/gu/tip/Configuration.scala
+++ b/src/main/scala/com/gu/tip/Configuration.scala
@@ -28,7 +28,7 @@ class PathConfigurationSyntaxError(
 
 object Configuration {
   object TipYamlProtocol extends DefaultYamlProtocol {
-    implicit val pathFormat = yamlFormat2(Path)
+    implicit val pathFormat: YamlFormat[Path] = yamlFormat2(Path)
   }
 
   import TipYamlProtocol._