diff --git a/build-constraints.yaml b/build-constraints.yaml
index ae18c44c..9c4138ed 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1314,7 +1314,7 @@ packages:
         - either-unwrap
 
     "Silk <code@silk.co>":
-        - aeson-utils
+        - aeson-utils < 0
         - arrow-list < 0
         - attoparsec-expr
         - code-builder < 0
@@ -1324,14 +1324,14 @@ packages:
         - imagesize-conduit
         - json-schema < 0
         - multipart
-        # - rest-client # http-types 0.12
-        - rest-core < 0 # GHC 8.4 via base-4.11.0.0
-        - rest-snap < 0 # GHC 8.4 via rest-core
-        # - rest-gen
-        # - rest-happstack # containers
-        - rest-stringmap < 0 # via aeson-1.4.0.0
-        - rest-types < 0 # GHC 8.4 via base-4.11.0.0
-        # - rest-wai # http-types 0.12
+        - rest-client < 0
+        - rest-core < 0
+        - rest-gen < 0
+        - rest-happstack < 0
+        - rest-snap < 0
+        - rest-stringmap < 0
+        - rest-types < 0
+        - rest-wai < 0
         - tostring
         - uri-encode