diff --git a/build-constraints.yaml b/build-constraints.yaml
index a7382729..29b57273 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1167,11 +1167,6 @@ packages:
         # https://github.com/fpco/stackage/issues/659
         - pandoc < 1.15
 
-        # https://github.com/k-bx/protocol-buffers/issues/1
-        - protocol-buffers < 2.1
-        - protocol-buffers-descriptor < 2.1
-        - hprotoc < 2.1
-
 # Package flags are applied to individual packages, and override the values of
 # global-flags
 package-flags: