diff --git a/build-constraints.yaml b/build-constraints.yaml
index e3ca868b..c784abda 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3258,12 +3258,6 @@ packages:
         - Win32 == 2.3.1.1
 
     "Stackage upper bounds":
-        # https://github.com/fpco/stackage/issues/2127
-        - leapseconds-announced < 2017.0.0.1 # Wait for GHC 8.2.1
-
-        # https://github.com/fpco/stackage/issues/2528
-        - concurrent-output < 1.10.0 # Wait for GHC 8.2.1
-
         # WIP: Issues are coming ...
         - base < 4.10
         - hslua < 0.6