diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/DependencyManager.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/DependencyManager.kt
index 9bcbee7a..6913c8ed 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/DependencyManager.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/DependencyManager.kt
@@ -150,7 +150,7 @@ class DependencyManager @Inject constructor(val executors: KobaltExecutors,
                 result.filter { ! isDependencyExcluded(it, project.excludedDependencies) }
             } else {
                 result
-            }
+            }.toHashSet()
         val reordered = reorderDependencies(shortResult)
         return reordered
     }