diff --git a/build-constraints.yaml b/build-constraints.yaml
index ac7564d1..ef1043dd 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1894,7 +1894,7 @@ packages:
         - random-tree
         - clumpiness
         # - find-clumpiness # BLOCKED optparse-applicative https://github.com/GregorySchwartz/find-clumpiness/issues/1
-        # - blosum # BLOCKED optparse-applicative https://github.com/GregorySchwartz/blosum/issues/2
+        - blosum
 
     "Simon Marechal <bartavelle@gmail.com> @bartavelle":
         - compactmap