diff --git a/stack.yaml b/stack.yaml
index c97d7cb5..b775d11c 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -36,3 +36,4 @@ extra-deps:
 - basement-0.0.6
 - foundation-0.0.19
 - memory-0.14.14
+- simple-sendfile-0.2.27