diff --git a/nix-serve-ng.cabal b/nix-serve-ng.cabal
index 2484fe7..9298f9a 100644
--- a/nix-serve-ng.cabal
+++ b/nix-serve-ng.cabal
@@ -39,7 +39,7 @@ executable nix-serve
     cxx-options:      -std=c++17
 
     build-depends:    base < 5
-                    , base16
+                    , base16 >= 1.0
                     , base32
                     , bytestring
                     , charset
diff --git a/src/Nix.hsc b/src/Nix.hsc
index f336617..0bd007d 100644
--- a/src/Nix.hsc
+++ b/src/Nix.hsc
@@ -231,7 +231,7 @@ fingerprintPath storePath PathInfo{ narHash, narSize, references } = do
 
     base32Suffix <- if
         | ByteString.length suffix == 64
-        , Right digest <- Base16.decodeBase16 suffix ->
+        , Right digest <- Base16.decodeBase16Untyped suffix ->
             return (Base32.encodeBase32' digest)
         | ByteString.length suffix == 52 ->
             return suffix