diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4087408f..b67be95b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3895,6 +3895,9 @@ packages:
     "Akihito Kirisaki <kirisaki@klaraworks.net> @kirisaki":
         - caster
 
+    "Felix Paulusma <felix.paulusma@gmail.com> @Vlix":
+        - safe-json
+
     "Grandfathered dependencies":
         - Boolean
         - ChasingBottoms
@@ -5096,6 +5099,7 @@ expected-test-failures:
     - doctest-discover # 0.1.0.9 https://github.com/karun012/doctest-discover/issues/22
     - graylog # 0.1.0.1 https://github.com/fpco/stackage/pull/1254
     - tomland # https://github.com/kowainik/tomland/issues/141
+    - safe-json # 0.1.0 https://github.com/Vlix/safe-json/issues/1
 
     # Assertion failures, these can be real bugs or just limitations
     # in the test cases.