diff --git a/build-constraints.yaml b/build-constraints.yaml
index 137b2a65..e760b79f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2958,8 +2958,7 @@ packages:
         - hocilib
 
     "Matthias Herrmann <matthias.mh.herrmann@gmail.com> @2chilled":
-        []
-        # - scrape-changes # cannot build because validation fails https://github.com/NICTA/validation/issues/9
+        - scrape-changes
 
     "Daniel Mendler <mail@daniel-mendler.de> @minad":
         - quickcheck-special
@@ -3019,8 +3018,8 @@ packages:
         []
         # - HDBC-mysql # GHC 8.2.1
 
-#    "Tony Morris <haskell@tmorris.net> @tonymorris":
-#        - validation # https://github.com/fpco/stackage/pull/2872
+    "Tony Morris <haskell@tmorris.net> @tonymorris":
+        - validation
 
     "Tony Day <tonyday567@gmail.com> @tonyday567":
         - numhask