5 files changed, 11 insertions, 4 deletions
diff --git a/.ci/build b/.ci/build
index b70fbfa..2d42ac6 100755
--- a/.ci/build
+++ b/.ci/build
@@ -7,7 +7,7 @@ sbt scalafmtTest +test
 if [[ "$TRAVIS_PULL_REQUEST" == "false" && "$TRAVIS_TAG" =~ ^v[0-9].* ]]; then
     # Setup gpg keys
     gpg --keyserver keyserver.ubuntu.com --recv-key "DC7751D77486D755815C04AB488F99C904F077E8"
-    openssl aes-256-cbc -K "$encrypted_c6e2aee6c53f_key" -iv "$encrypted_c6e2aee6c53f_iv" -in sec.gpg.enc -out sec.gpg -d
+    openssl aes-256-cbc -K "$encrypted_c6e2aee6c53f_key" -iv "$encrypted_c6e2aee6c53f_iv" -in .ci/sec.gpg.enc -out sec.gpg -d
     gpg --import sec.gpg
 
     # Set up publishing settings and credentials
diff --git a/README.md b/README.md
index 04a7203..36f6a2c 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
+[![Build Status](https://travis-ci.org/drivergroup/tracing.svg?branch=master)](https://travis-ci.org/drivergroup/tracing)
+[![Download](https://img.shields.io/maven-central/v/xyz.driver/tracing_2.12.svg)](http://search.maven.org/#search|ga|1|xyz.driver%20tracing-)
+
+
 # Driver Tracing Library
 
 A vendor-neutral tracing library for Akka-HTTP.
@@ -13,7 +17,7 @@ library. Include it in sbt by adding the following snippet to your
 build.sbt:
 
 ```scala
-libraryDependencies += "xyz.driver" %% "tracing" % "0.0.1"
+libraryDependencies += "xyz.driver" %% "tracing" % "<latest version>"
 ```
 
 ### Example
diff --git a/build.sbt b/build.sbt
index 08efff3..8085b79 100644
--- a/build.sbt
+++ b/build.sbt
@@ -4,7 +4,8 @@ version in ThisBuild := {
   ("git describe --always --dirty=-SNAPSHOT --match v[0-9].*" !!).tail.trim
 }
 
-scalaVersion := "2.12.3"
+crossScalaVersions := Seq("2.11.11", "2.12.3")
+scalaVersion := crossScalaVersions.value.last
 
 libraryDependencies ++= Seq(
   "com.pauldijou" %% "jwt-core" % "0.14.0",
diff --git a/project/plugins.sbt b/project/plugins.sbt
index ab0cfab..a1e2f8a 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1 +1,3 @@
+ivyLoggingLevel := UpdateLogging.Quiet
+
 addSbtPlugin("com.geirsson" % "sbt-scalafmt" % "1.2.0")
diff --git a/src/main/scala/Tracer.scala b/src/main/scala/Tracer.scala
index 3d82489..3eddc1d 100644
--- a/src/main/scala/Tracer.scala
+++ b/src/main/scala/Tracer.scala
@@ -13,6 +13,6 @@ trait Tracer {
   def submit(span: Span): Unit
 
   /** Aggregate any potentially queued submissions and perform any cleanup logic. */
-  def close(): Future[_] = Future.unit
+  def close(): Future[_] = Future.successful(())
 
 }