diff --git a/.travis.yml b/.travis.yml
index 9a1c7fd..f4ad59b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ scala:
   - 2.12.8
 
 jdk:
-  - oraclejdk8
+  - openjdk8
 
 before_cache:
   - find $HOME/.sbt -name '*.lock' -delete
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 63a225c..ffdc658 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,8 +1,8 @@
-addSbtPlugin("com.thoughtworks.sbt-best-practice" % "sbt-best-practice" % "7.0.1")
+addSbtPlugin("com.thoughtworks.sbt-best-practice" % "sbt-best-practice" % "7.1.0")
 
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "2.5")
 
-addSbtPlugin("com.dwijnand" % "sbt-dynver" % "3.3.0+16-0f6d7799")
+addSbtPlugin("com.dwijnand" % "sbt-dynver" % "3.3.0+19-f9a4262c")
 
 addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.1.2")
 
diff --git a/project/project/plugins.sbt b/project/project/plugins.sbt
index 08e93dc..bb02ff0 100644
--- a/project/project/plugins.sbt
+++ b/project/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.1.0-M11")
+addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.1.0-M14-3")
diff --git a/secret.sbt b/secret.sbt
index 9d6a568..3279570 100644
--- a/secret.sbt
+++ b/secret.sbt
@@ -1,16 +1,19 @@
-lazy val secret = project.settings(publishArtifact := false).in {
-  val secretDirectory = file(sourcecode.File()).getParentFile / "secret"
-  for (token <- sys.env.get("GITHUB_PERSONAL_ACCESS_TOKEN")) {
-    IO.delete(secretDirectory)
-    org.eclipse.jgit.api.Git
-      .cloneRepository()
-      .setURI("https://github.com/ThoughtWorksInc/tw-data-china-continuous-delivery-password.git")
-      .setDirectory(secretDirectory)
-      .setCredentialsProvider(
-        new org.eclipse.jgit.transport.UsernamePasswordCredentialsProvider(token, "")
-      )
-      .call()
-      .close()
+lazy val secret = {
+  for (token <- sys.env.get("GITHUB_PERSONAL_ACCESS_TOKEN")) yield {
+    val secret = project.settings(publishArtifact := false).in {
+      val secretDirectory = file(sourcecode.File()).getParentFile / "secret"
+      IO.delete(secretDirectory)
+      org.eclipse.jgit.api.Git
+        .cloneRepository()
+        .setURI("https://github.com/ThoughtWorksInc/tw-data-china-continuous-delivery-password.git")
+        .setDirectory(secretDirectory)
+        .setCredentialsProvider(
+          new org.eclipse.jgit.transport.UsernamePasswordCredentialsProvider(token, "")
+        )
+        .call()
+        .close()
+      secretDirectory
+    }
+    secret
   }
-  secretDirectory
-}
+}.getOrElse(null)