diff --git a/.travis.yml b/.travis.yml
index b7407c9..e96a3c3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,5 @@
 language: scala
 scala:
-   - 2.11.12
    - 2.12.8
 jdk:
   - oraclejdk8
diff --git a/README.md b/README.md
index e7e727b..d4276da 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ There are three types of accounts supported by OER API, Unlimited, Enterprise an
 
 ### 2.2 Installation
 
-The latest version of Scala Forex is 0.6.0, which is cross-built against 2.11.x and 2.12.x.
+The latest version of Scala Forex is 0.6.0, which is built against 2.12.x.
 
 If you're using SBT, add the following lines to your build file:
 
diff --git a/project/BuildSettings.scala b/project/BuildSettings.scala
index d7b8011..bd7e4e9 100644
--- a/project/BuildSettings.scala
+++ b/project/BuildSettings.scala
@@ -33,7 +33,6 @@ object BuildSettings {
   lazy val buildSettings = Seq[Setting[_]](
     organization          := "com.snowplowanalytics",
     scalaVersion          := "2.12.8",
-    crossScalaVersions    := Seq("2.11.12", "2.12.8")
   )
 
   // Publish settings
diff --git a/src/main/scala/com.snowplowanalytics/forex/OerClient.scala b/src/main/scala/com.snowplowanalytics/forex/OerClient.scala
index 948b114..09f125d 100644
--- a/src/main/scala/com.snowplowanalytics/forex/OerClient.scala
+++ b/src/main/scala/com.snowplowanalytics/forex/OerClient.scala
@@ -33,8 +33,8 @@ import responses._
  */
 case class OerClient[F[_]: Sync](
   config: ForexConfig,
-  val nowishCache: Option[NowishCache[F]] = None,
-  val eodCache: Option[EodCache[F]]       = None,
+  nowishCache: Option[NowishCache[F]] = None,
+  eodCache: Option[EodCache[F]]       = None,
   transport: Transport[F]
 ) {