diff --git a/cabal.project b/cabal.project
index e6fdbad..8396227 100644
--- a/cabal.project
+++ b/cabal.project
@@ -1 +1,3 @@
 packages: .
+constraints:
+  , bytestring >=0.12
diff --git a/hasql-transaction.cabal b/hasql-transaction.cabal
index 8976841..a073148 100644
--- a/hasql-transaction.cabal
+++ b/hasql-transaction.cabal
@@ -73,7 +73,7 @@ library
 
   build-depends:
       base >=4.12 && <5
-    , bytestring >=0.10 && <0.12
+    , bytestring >=0.10 && <0.13
     , bytestring-tree-builder >=0.2.7.8 && <0.3
     , contravariant >=1.3 && <2
     , contravariant-extras >=0.3 && <0.4