diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/aether/Aether.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/aether/Aether.kt
index b1d95469..f4c5bd1b 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/aether/Aether.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/aether/Aether.kt
@@ -4,12 +4,16 @@ import com.beust.kobalt.KobaltException
 import com.beust.kobalt.api.IClasspathDependency
 import com.beust.kobalt.api.Kobalt
 import com.beust.kobalt.internal.KobaltSettings
+import com.beust.kobalt.internal.KobaltSettingsXml
 import com.beust.kobalt.maven.CompletedFuture
 import com.beust.kobalt.maven.MavenId
 import com.beust.kobalt.misc.KobaltLogger
 import com.beust.kobalt.misc.Versions
 import com.beust.kobalt.misc.log
 import com.beust.kobalt.misc.warn
+import com.google.common.cache.CacheBuilder
+import com.google.common.cache.CacheLoader
+import com.google.common.cache.LoadingCache
 import com.google.inject.Inject
 import org.eclipse.aether.artifact.Artifact
 import org.eclipse.aether.artifact.DefaultArtifact
@@ -32,6 +36,15 @@ class DependencyResult(val dependency: IClasspathDependency, val repoUrl: String
 class KobaltAether @Inject constructor (val settings: KobaltSettings) {
     val localRepo: File get() = File(settings.localRepo)
 
+    class MaybeArtifact(val result: DependencyResult?, val error: String?)
+
+    private val CACHE : LoadingCache<String, MaybeArtifact> = CacheBuilder.newBuilder()
+            .build(object : CacheLoader<String, MaybeArtifact>() {
+                override fun load(id: String): MaybeArtifact {
+                    return doResolve(id)
+                }
+            })
+
     /**
      * Don't call this method directly, use `DepFactory` instead.
      */
@@ -48,11 +61,20 @@ class KobaltAether @Inject constructor (val settings: KobaltSettings) {
         }
 
     fun resolve(id: String): DependencyResult {
+        val result = CACHE.get(id)
+        if (result.result != null) return result.result
+            else throw KobaltException("Couldn't resolve $id")
+    }
+
+    private fun doResolve(id: String): MaybeArtifact {
+        log(1, "Resolving $id")
         val results = Aether(localRepo).resolve(DefaultArtifact(MavenId.toKobaltId(id)))
         if (results != null && results.size > 0) {
-            return DependencyResult(AetherDependency(results[0].artifact), results[0].repository.toString())
+            return MaybeArtifact(
+                    DependencyResult(AetherDependency(results[0].artifact), results[0].repository.toString()),
+                    null)
         } else {
-            throw KobaltException("Couldn't resolve $id")
+            return MaybeArtifact(null, "Couldn't locate $id")
         }
     }
 }
@@ -222,7 +244,11 @@ class AetherDependency(val artifact: Artifact): IClasspathDependency, Comparable
 }
 
 fun main(argv: Array<String>) {
-    KobaltLogger.LOG_LEVEL = 2
+    KobaltLogger.LOG_LEVEL = 1
+    val id = "org.testng:testng:6.9.11"
+    val aether = KobaltAether(KobaltSettings(KobaltSettingsXml()))
+    val r = aether.resolve(id)
+    val r2 = aether.resolve(id)
     val d = org.eclipse.aether.artifact.DefaultArtifact("org.testng:testng:6.9")
 
     println("Artifact: " + d)