diff --git a/build-constraints.yaml b/build-constraints.yaml
index 768ba8d7..5af44bca 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1073,8 +1073,7 @@ packages:
         - amazonka-waf
         - amazonka-workspaces
         - ede
-        # aeson < 0.10
-        # - pagerduty
+        - pagerduty
         - semver
         - text-manipulate
 
@@ -1262,11 +1261,11 @@ packages:
         - serf
         - uri-templater
         - librato
-        # aeson < 0.10
-        # - datadog
+        - datadog
+        # http-types < 0.9
         # - engine-io-growler
-        # - flowdock
-        # - growler
+        - flowdock
+        - growler
 
     "Michael Xavier <michael@michaelxavier.net> @MichaelXavier":
         - angel
@@ -1674,10 +1673,9 @@ packages:
 
     "Takahiro Himura <himuratk421@gmail.com> @thimura":
         - lens-regex
-        # aeson < 0.10 (serious test-suite failures)
-        # - twitter-conduit
-        # - twitter-types
-        # - twitter-types-lens
+        - twitter-conduit
+        - twitter-types
+        - twitter-types-lens
 
     "Robbin C. <robbinch33@gmail.com>":
         - zim-parser