diff --git a/stack8.0.yaml b/stack8.0.yaml
index d17f4d09c..0648c0e8f 100644
--- a/stack8.0.yaml
+++ b/stack8.0.yaml
@@ -19,6 +19,7 @@ extra-deps:
 # This is just the first workable install plan I found.
 - aeson-1.3.1.1
 - aeson-compat-0.3.7.1
+- aeson-pretty-0.8.8
 - attoparsec-0.13.2.2
 - attoparsec-iso8601-1.0.0.0
 - base-compat-0.10.1