diff --git a/src/Index/AbstractAggregateIndex.php b/src/Index/AbstractAggregateIndex.php
index 5377c3a..39c1a1d 100644
--- a/src/Index/AbstractAggregateIndex.php
+++ b/src/Index/AbstractAggregateIndex.php
@@ -42,6 +42,9 @@ abstract class AbstractAggregateIndex implements ReadableIndex
         $index->on('definition-added', function () {
             $this->emit('definition-added');
         });
+        $index->on('wipe', function() {
+            $this->emit('wipe');
+        });
     }
 
     /**
@@ -147,4 +150,14 @@ abstract class AbstractAggregateIndex implements ReadableIndex
         }
         return $refs;
     }
+
+    /**
+     * Wipe all indexes for a reindex
+     */
+    public function wipe()
+    {
+        foreach ($this->getIndexes() as $index) {
+            $index->wipe();
+        }
+    }
 }
diff --git a/src/Index/Index.php b/src/Index/Index.php
index 5c24813..e912087 100644
--- a/src/Index/Index.php
+++ b/src/Index/Index.php
@@ -211,4 +211,14 @@ class Index implements ReadableIndex, \Serializable
             'staticComplete' => $this->staticComplete
         ]);
     }
+
+    public function wipe()
+    {
+        $this->definitions = [];
+        $this->references = [];
+        $this->complete = false;
+        $this->staticComplete = false;
+
+        $this->emit('wipe');
+    }
 }
diff --git a/src/Server/Workspace.php b/src/Server/Workspace.php
index b94618c..3a10b78 100644
--- a/src/Server/Workspace.php
+++ b/src/Server/Workspace.php
@@ -170,4 +170,9 @@ class Workspace
         }
         return $dependencyReferences;
     }
+
+    public function didChangeConfiguration($settings = null)
+    {
+        $this->index->wipe();
+    }
 }