diff --git a/src/hspec/Main/LawfulConversionsHspec.hs b/src/hspec/Main/LawfulConversionsHspec.hs
--- a/src/hspec/Main/LawfulConversionsHspec.hs
+++ b/src/hspec/Main/LawfulConversionsHspec.hs
@@ -15,7 +15,7 @@
   forM_ (LawfulConversions.isSomeProperties a b) \(name, property) ->
     prop name property
 
-isMany :: (LawfulConversions.IsMany a b, Eq a, Eq b, Show a, Show b, Arbitrary b) => Proxy a -> Proxy b -> Spec
+isMany :: (LawfulConversions.IsMany a b, Eq a, Eq b, Show a, Show b, Arbitrary a, Arbitrary b) => Proxy a -> Proxy b -> Spec
 isMany a b = describe "IsMany" do
   forM_ (LawfulConversions.isManyProperties a b) \(name, property) ->
     prop name property
diff --git a/src/library/TextBuilderLawfulConversions.hs b/src/library/TextBuilderLawfulConversions.hs
--- a/src/library/TextBuilderLawfulConversions.hs
+++ b/src/library/TextBuilderLawfulConversions.hs
@@ -17,7 +17,6 @@
 where
 
 import LawfulConversions (Is, IsMany, IsSome)
-import TextBuilder (TextBuilder)
 import TextBuilderLawfulConversions.LazyBuilder ()
 import TextBuilderLawfulConversions.LazyText ()
 import TextBuilderLawfulConversions.StrictBuilder ()
diff --git a/text-builder-lawful-conversions.cabal b/text-builder-lawful-conversions.cabal
--- a/text-builder-lawful-conversions.cabal
+++ b/text-builder-lawful-conversions.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.0
 name: text-builder-lawful-conversions
-version: 0.1.1
+version: 0.1.2
 category: Text, Builders, Conversions
 synopsis: Orphan instances of "lawful-conversions" for "text-builder"
 homepage: https://github.com/nikita-volkov/text-builder-lawful-conversions
@@ -88,7 +88,7 @@
 
   build-depends:
     base >=4.13 && <5,
-    lawful-conversions ^>=0.1.7,
+    lawful-conversions >=0.2 && <0.3,
     text >=1.2 && <3,
     text-builder ^>=1.0.0.1,
     text-builder-core ^>=0.1.1.1,