diff --git a/docs/source/support/release-notes.rst b/docs/source/support/release-notes.rst
index 4d4d834a6450..3df175951293 100644
--- a/docs/source/support/release-notes.rst
+++ b/docs/source/support/release-notes.rst
@@ -14,6 +14,8 @@ Sandbox
 
 - Fixed a bug in an internal data structure that broke contract keys.
   See `#1623 <https://github.com/digital-asset/daml/issues/1623>`__.
+- Fixed a bug of not closing a resource properly when shutting down the Sandbox.
+  See `#1702 <https://github.com/digital-asset/daml/pull/1702>`__.
 
 0.12.25 — 2019-06-13
 --------------------
diff --git a/ledger/sandbox/src/main/scala/com/digitalasset/platform/sandbox/stores/ledger/sql/SqlLedger.scala b/ledger/sandbox/src/main/scala/com/digitalasset/platform/sandbox/stores/ledger/sql/SqlLedger.scala
index 7d72121ab019..38c62b5ac1dd 100644
--- a/ledger/sandbox/src/main/scala/com/digitalasset/platform/sandbox/stores/ledger/sql/SqlLedger.scala
+++ b/ledger/sandbox/src/main/scala/com/digitalasset/platform/sandbox/stores/ledger/sql/SqlLedger.scala
@@ -210,6 +210,7 @@ private class SqlLedger(
 
   override def close(): Unit = {
     persistenceQueue.complete()
+    checkpointQueue.complete()
     ledgerDao.close()
   }