diff --git a/build-constraints.yaml b/build-constraints.yaml
index 28844543..5bbb2f0d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3073,6 +3073,9 @@ packages:
         # https://github.com/fpco/stackage/issues/2440
         - discord-hs < 0.3.2
 
+        # https://github.com/fpco/stackage/issues/2449
+        - aeson < 1.2.0.0
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of