diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4884fc99..f338b669 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1584,7 +1584,7 @@ packages:
         - inflections
         - twitter-feed
         - cassava-megaparsec
-        # BLOCKED megaparsec 5 - dotenv
+        - dotenv
 
     "Sergey Alirzaev <zl29ah@gmail.com>":
         - monad-peel