diff --git a/README.md b/README.md
index 9639340..1ea4149 100644
--- a/README.md
+++ b/README.md
@@ -15,9 +15,9 @@ For example output [click here](https://coveralls.io/r/scoverage/scoverage-sampl
 
 ```scala
 
-addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.5.1")
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.8.2")
 
-addSbtPlugin("org.scoverage" % "sbt-coveralls" % "1.2.7")
+addSbtPlugin("org.scoverage" % "sbt-coveralls" % "1.3.1")
 ```
 
 2) Setup coveralls configuration options (such as [Specifying Your Repo Token](#specifying-your-repo-token))
@@ -161,12 +161,13 @@ scalacOptions += Seq("-encoding", "UTF-8")
 
 ## Using Travis-Pro
 
-It is important to set the correct `service_name` when using Travis-Pro.  The default is to use `travis-ci`.  To override this value, add the following to your `build.sbt`
+It is important to set the correct `service` when using Travis-Pro.  The default is to use `travis-ci`.  To override this value, add the following to your `build.sbt`
 
 ```scala
 import org.scoverage.coveralls.Imports.CoverallsKeys._
+import org.scoverage.coveralls.TravisPro
 
-coverallsServiceName := Some("travis-pro")
+coverallsService := Some(TravisPro)
 ```
 
 # License
diff --git a/src/main/scala/org/scoverage/coveralls/CIService.scala b/src/main/scala/org/scoverage/coveralls/CIService.scala
index a3fae6f..e1e7351 100644
--- a/src/main/scala/org/scoverage/coveralls/CIService.scala
+++ b/src/main/scala/org/scoverage/coveralls/CIService.scala
@@ -11,24 +11,32 @@ trait CIService {
 }
 
 case object TravisCI extends CIService {
-  def name = "travis-ci"
-  def jobId = sys.env.get("TRAVIS_JOB_ID")
-  def pullRequest = sys.env.get("CI_PULL_REQUEST")
+  val name = "travis-ci"
+  val jobId: Option[String] = sys.env.get("TRAVIS_JOB_ID")
+  val pullRequest: Option[String] = sys.env.get("CI_PULL_REQUEST")
+  val currentBranch: Option[String] = sys.env.get("CI_BRANCH")
+}
 
-  def currentBranch = sys.env.get("CI_BRANCH")
+case object TravisPro extends CIService {
+  val name = "travis-pro"
+  val jobId: Option[String] = sys.env.get("TRAVIS_JOB_ID")
+  val pullRequest: Option[String] = sys.env.get("CI_PULL_REQUEST")
+  val currentBranch: Option[String] = sys.env.get("CI_BRANCH")
 }
 
 case object GitHubActions extends CIService {
-  def name = "github"
-  def jobId = sys.env.get("GITHUB_RUN_ID")
+  val name = "github"
+  val jobId: Option[String] = sys.env.get("GITHUB_RUN_ID")
 
   // https://github.com/coverallsapp/github-action/blob/master/src/run.ts#L31-L40
-  def pullRequest = for {
+  val pullRequest: Option[String] = for {
     eventName <- sys.env.get("GITHUB_EVENT_NAME") if eventName == "pull_request"
     payloadPath <- sys.env.get("GITHUB_EVENT_PATH")
-    payload <- JSON.parseRaw(Source.fromFile(payloadPath, "utf-8").mkString)
+    source = Source.fromFile(payloadPath, "utf-8")
+    lines = try source.mkString finally source.close()
+    payload <- JSON.parseRaw(lines)
     prNumber <- payload.asInstanceOf[JSONObject].obj.get("number")
   } yield prNumber.toString
 
-  def currentBranch = sys.env.get("GITHUB_REF")
+  val currentBranch: Option[String] = sys.env.get("GITHUB_REF")
 }