diff --git a/build-constraints.yaml b/build-constraints.yaml
index dd7f9625..5acc05db 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2449,6 +2449,7 @@ packages:
         # https://github.com/fpco/stackage/issues/1764
         - aeson < 1.0
         - insert-ordered-containers < 0.2
+        - swagger2 < 2.1.2
 
         # https://github.com/fpco/stackage/issues/1767
         - SVGFonts < 1.6