diff --git a/README.md b/README.md
index c7e55db..4807eda 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@
 
 Padded and unpadded base64 and base64url encodings for `Text` and `ByteString` values, along with their optics.
 
+For the companion `Prism`s and pattern synonyms, see [base64-lens](https://hackage.haskell.org/package/base64-lens).
+
 
 ### Summary
 
diff --git a/base64.cabal b/base64.cabal
index b5b46e5..96076b0 100644
--- a/base64.cabal
+++ b/base64.cabal
@@ -17,6 +17,7 @@ build-type:          Simple
 extra-source-files:
   CHANGELOG.md
   README.md
+  benchmarks/PERFORMANCE.md
 
 tested-with:         GHC ==8.8.1 || ==8.6.5 || ==8.6.3 || ==8.4.4 || ==8.4.3 || ==8.2.2