diff --git a/ReleaseNotes.md b/ReleaseNotes.md
index 7a91b4f..96b1108 100644
--- a/ReleaseNotes.md
+++ b/ReleaseNotes.md
@@ -1,3 +1,9 @@
+# Version 5.4.1
+
+## Bug fixes:
+
+- Fix an inadvertently changed signature breaking binary compatibility with 5.3.0
+
 # Version 5.4.0
 
 ## New features:
diff --git a/SafetyFirst/SafetyFirst.fsproj b/SafetyFirst/SafetyFirst.fsproj
index a5af151..7c9a3d0 100644
--- a/SafetyFirst/SafetyFirst.fsproj
+++ b/SafetyFirst/SafetyFirst.fsproj
@@ -10,7 +10,7 @@
   <PropertyGroup>
     <PackageId>SafetyFirst</PackageId>
     <Title>SafetyFirst</Title>
-    <PackageVersion>5.4.0</PackageVersion>
+    <PackageVersion>5.4.1</PackageVersion>
     <Authors>nathan wilson</Authors>
     <Description>Total functions made convenient for F# and C#</Description>
     <PackageReleaseNotes>See release notes in github at https://github.com/ntwilson/SafetyFirst/blob/main/ReleaseNotes.md</PackageReleaseNotes>
diff --git a/SafetyFirst/Seq.fs b/SafetyFirst/Seq.fs
index 2c1b64b..2e6ea25 100644
--- a/SafetyFirst/Seq.fs
+++ b/SafetyFirst/Seq.fs
@@ -988,7 +988,7 @@ module NonEmpty =
   ///   //returns ([[1;2;3;100];[100];[4;100];[5;6]])
   /// </code>
   /// </summary>
-  let split splitAfter (NonEmpty xs : NonEmptySeq<_>) : NonEmptySeq<NonEmptySeq<_>> = 
+  let split splitAfter (NonEmpty xs) : NonEmptySeq<NonEmptySeq<_>> = 
     NonEmpty <| split splitAfter xs
 
   /// <summary>
@@ -1006,7 +1006,7 @@ module NonEmpty =
   /// If the source sequence is finite, you can achieve better performance by converting it to 
   /// a list or array first and using <c>List.splitPairwise</c> or <c>Array.splitPairwise</c> instead.
   /// </summary>
-  let splitPairwise splitBetween (NonEmpty xs: NonEmptySeq<_>) : NonEmptySeq<NonEmptySeq<_>> =
+  let splitPairwise splitBetween (NonEmpty xs) : NonEmptySeq<NonEmptySeq<_>> =
     NonEmpty <| splitPairwise splitBetween xs
 
   type ZipperExpression() =