diff --git a/hasql-postgres.cabal b/hasql-postgres.cabal
--- a/hasql-postgres.cabal
+++ b/hasql-postgres.cabal
@@ -1,7 +1,7 @@
 name:
   hasql-postgres
 version:
-  0.3.1
+  0.3.2
 synopsis:
   A "PostgreSQL" backend for the "hasql" library
 description:
@@ -89,7 +89,7 @@
     loch-th == 0.2.*,
     placeholders == 0.1.*,
     -- general:
-    mtl-prelude == 2.0.*,
+    mtl-prelude < 3,
     base-prelude >= 0.1.3 && < 0.2,
     base >= 4.5 && < 4.8
 
@@ -139,7 +139,7 @@
     loch-th == 0.2.*,
     placeholders == 0.1.*,
     -- general:
-    mtl-prelude == 2.0.*,
+    mtl-prelude < 3,
     base-prelude >= 0.1.3 && < 0.2,
     base >= 4.5 && < 4.8
 
@@ -181,7 +181,7 @@
     hashable == 1.2.*,
     -- general:
     list-t == 0.2.*,
-    mtl-prelude == 2.0.*,
+    mtl-prelude < 3,
     base-prelude >= 0.1.3 && < 0.2,
     base >= 4.5 && < 4.8