diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/DynamicGraph.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/DynamicGraph.kt
index ec31422f..2b1f3c2f 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/DynamicGraph.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/DynamicGraph.kt
@@ -65,15 +65,18 @@ class DynamicGraph<T> {
             }
         }
 
-        fun <T> transitiveClosureGraph(roots: List<T>, childrenFor: (T) -> List<T>) : List<Node<T>>
-            = roots.map { transitiveClosureGraph(it, childrenFor) }
+        fun <T> transitiveClosureGraph(roots: List<T>, childrenFor: (T) -> List<T>,
+                filter: (T) -> Boolean): List<Node<T>>
+            = roots.map { transitiveClosureGraph(it, childrenFor, filter) }
 
-        fun <T> transitiveClosureGraph(root: T, childrenFor: (T) -> List<T>, seen: HashSet<T> = hashSetOf()) : Node<T> {
+        fun <T> transitiveClosureGraph(root: T, childrenFor: (T) -> List<T>,
+                filter: (T) -> Boolean = { t: T -> true },
+                seen: HashSet<T> = hashSetOf()) : Node<T> {
             val children = arrayListOf<Node<T>>()
-            childrenFor(root).forEach { child ->
+            childrenFor(root).filter(filter).forEach { child ->
                 if (! seen.contains(child)) {
                     seen.add(child)
-                    val c = transitiveClosureGraph(child, childrenFor, seen)
+                    val c = transitiveClosureGraph(child, childrenFor, filter, seen)
                     children.add(c)
                 }
             }
diff --git a/src/main/kotlin/com/beust/kobalt/app/remote/RemoteDependencyData.kt b/src/main/kotlin/com/beust/kobalt/app/remote/RemoteDependencyData.kt
index 74beb0f5..667d79af 100644
--- a/src/main/kotlin/com/beust/kobalt/app/remote/RemoteDependencyData.kt
+++ b/src/main/kotlin/com/beust/kobalt/app/remote/RemoteDependencyData.kt
@@ -67,20 +67,21 @@ class RemoteDependencyData @Inject constructor(val executors: KobaltExecutors, v
                     children = node.children.map { toDependencyData2(scope, it) })
         }
 
+        val OPTIONAL_FILTER = { dep: IClasspathDependency -> ! dep.optional }
+
         fun compileDependenciesGraph(project: Project, name: String): List<DependencyData> {
             val depLambda = IClasspathDependency::directDependencies
             val result =
-                    (DynamicGraph.Companion.transitiveClosureGraph(pluginDependencies, depLambda) +
-                    DynamicGraph.Companion.transitiveClosureGraph(project.compileDependencies, depLambda) +
-                    DynamicGraph.Companion.transitiveClosureGraph(project.compileProvidedDependencies, depLambda))
+                    (DynamicGraph.Companion.transitiveClosureGraph(pluginDependencies, depLambda, OPTIONAL_FILTER) +
+                    DynamicGraph.Companion.transitiveClosureGraph(project.compileDependencies, depLambda,
+                            OPTIONAL_FILTER) +
+                    DynamicGraph.Companion.transitiveClosureGraph(project.compileProvidedDependencies, depLambda,
+                            OPTIONAL_FILTER))
                 .map { toDependencyData2("compile", it)}
 
             fun mapOfLatestVersions(l: List<DependencyData>) : Map<String, String> {
-                fun p(l: List<DependencyData>, latestVersions: HashMap<String, String>) {
+                fun p(l: List<DependencyData>, latestVersions: java.util.HashMap<String, String>) {
                     l.forEach {
-                        if (it.id.contains("squareup:okio")) {
-                            println("DONOTCOMMIT")
-                        }
                         val mid = MavenId.create(it.id)
                         val shortId = mid.artifactId + ":" + mid.artifactId
                         val currentLatest = latestVersions[shortId]
@@ -114,7 +115,7 @@ class RemoteDependencyData @Inject constructor(val executors: KobaltExecutors, v
 
         fun testDependenciesGraph(project: Project, name: String): List<DependencyData> {
             val depLambda = { dep : IClasspathDependency -> dep.directDependencies() }
-            return DynamicGraph.Companion.transitiveClosureGraph(project.testDependencies, depLambda)
+            return DynamicGraph.Companion.transitiveClosureGraph(project.testDependencies, depLambda, OPTIONAL_FILTER)
                     .map { toDependencyData2("testCompile", it)}
         }