diff --git a/server/src/main/java/com/hedera/block/server/BlockStreamService.java b/server/src/main/java/com/hedera/block/server/BlockStreamService.java
index 088df21b8..82819b3f7 100644
--- a/server/src/main/java/com/hedera/block/server/BlockStreamService.java
+++ b/server/src/main/java/com/hedera/block/server/BlockStreamService.java
@@ -191,6 +191,9 @@ void singleBlock(
                     "Unary singleBlock gRPC method is not currently running");
             singleBlockResponseStreamObserver.onNext(buildSingleBlockNotAvailableResponse());
         }
+
+        // Complete the response to send the response
+        singleBlockResponseStreamObserver.onCompleted();
     }
 
     static SingleBlockResponse buildSingleBlockResponse(final Block block) {