diff --git a/project/build.properties b/project/build.properties
index 817bc38d..43b8278c 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=0.13.9
+sbt.version=0.13.11
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 33096ea7..d807a3f1 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -2,6 +2,6 @@ resolvers += Classpaths.sbtPluginReleases
 
 addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "0.3.2")
 
-addSbtPlugin("com.typesafe.sbt" % "sbt-pgp" % "0.8.3")
+addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.0.0")
 
 addSbtPlugin("com.github.gseitz" % "sbt-release" % "0.8.5")
diff --git a/scalac-scoverage-plugin/src/main/scala/scoverage/report/BaseReportWriter.scala b/scalac-scoverage-plugin/src/main/scala/scoverage/report/BaseReportWriter.scala
index e16d133b..8d3b1759 100644
--- a/scalac-scoverage-plugin/src/main/scala/scoverage/report/BaseReportWriter.scala
+++ b/scalac-scoverage-plugin/src/main/scala/scoverage/report/BaseReportWriter.scala
@@ -10,20 +10,22 @@ class BaseReportWriter(sourceDirectories: Seq[File], outputDir: File) {
   /**
    * Converts absolute path to relative one if any of the source directories is it's parent.
    * If there is no parent directory, the path is returned unchanged (absolute).
-   * 
+   *
    * @param src absolute file path in canonical form
    */
   def relativeSource(src: String): String = relativeSource(src, formattedSourcePaths)
 
   private def relativeSource(src: String, sourcePaths: Seq[String]): String = {
+    // We need the canonical path for the given src because our formattedSourcePaths are canonical
+    val canonicalSrc = new File(src).getCanonicalPath
     val sourceRoot: Option[String] = sourcePaths.find(
-      sourcePath => src.startsWith(sourcePath)
+      sourcePath => canonicalSrc.startsWith(sourcePath)
     )
     sourceRoot match {
-      case Some(path: String) => src.replace(path, "")
+      case Some(path: String) => canonicalSrc.replace(path, "")
       case _ =>
         val fmtSourcePaths: String = sourcePaths.mkString("'", "', '", "'")
-        throw new RuntimeException(s"No source root found for '$src' (source roots: $fmtSourcePaths)");
+        throw new RuntimeException(s"No source root found for '$canonicalSrc' (source roots: $fmtSourcePaths)");
     }
   }