1 files changed, 1 insertions, 0 deletions
diff --git a/btls.cabal b/btls.cabal
index 1ff34f0..9d27272 100644
--- a/btls.cabal
+++ b/btls.cabal
@@ -88,6 +88,7 @@ library
   -- in OpenSSL.
   extra-libraries:     btls_crypto
   build-depends:       base >=4.9 && <4.10
+                     , base16-bytestring >=0.1.1.6 && <0.2
                      , bytestring >=0.10 && <0.11
                      , monad-loops >=0.4.3 && <0.5
                      , transformers >=0.5.2 && <0.6