diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0f83fb0a..945368bf 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2535,6 +2535,7 @@ packages:
 
         # https://github.com/fpco/stackage/issues/1833
         - http-api-data < 0.3
+        - servant-auth-cookie < 0.4 # also per servant < 0.9 #1906
 
         # https://github.com/fpco/stackage/issues/1842
         - dependent-sum < 0.4
@@ -2562,6 +2563,7 @@ packages:
         - servant-docs < 0.9
         - servant-js < 0.9
         - language-puppet < 1.3.2
+        - servant-auth-cookie < 0.4 # also per http-api-data < 0.3 #1833
 
         # https://github.com/fpco/stackage/issues/1929
         - hspec-megaparsec < 0.3.0