1 files changed, 3 insertions, 0 deletions
diff --git a/lib/priorityQueue.js b/lib/priorityQueue.js
index 6cc10ed..90ca03e 100644
--- a/lib/priorityQueue.js
+++ b/lib/priorityQueue.js
@@ -53,6 +53,9 @@ export default function(worker, concurrency) {
             if (q.tasks.length === q.concurrency) {
                 q.saturated();
             }
+            if (q.tasks.length <= (q.concurrency - q.buffer) ) {
+                q.unsaturated();
+            }
             setImmediate(q.process);
         });
     }