diff --git a/stack-8.10.2.yaml b/stack-8.10.2.yaml
index 32d010df..ce0f0e53 100644
--- a/stack-8.10.2.yaml
+++ b/stack-8.10.2.yaml
@@ -7,6 +7,7 @@ extra-deps:
 - alex-3.2.5
 - happy-1.19.12
 - semigroups-0.19.1
+- string-qq-0.0.4
 
 # For --test and package 'testing'
 - Diff-0.4.0