diff --git a/hash/blake2.cpp b/hash/blake2.cpp
index 1f4297b..e1cb8cb 100644
--- a/hash/blake2.cpp
+++ b/hash/blake2.cpp
@@ -11,7 +11,7 @@
 #include <cruft/util/bitwise.hpp>
 #include <cruft/util/debug/assert.hpp>
 #include <cruft/util/endian.hpp>
-#include <cruft/util/types.hpp>
+#include <cruft/util/types/sized.hpp>
 
 using cruft::crypto::hash::blake2;
 
@@ -20,7 +20,7 @@ using cruft::crypto::hash::blake2;
 // blake2b: u64
 struct traits {
     static constexpr int word_bits = 64;
-    using word_t = typename cruft::bits_type<word_bits>::uint;
+    using word_t = typename cruft::types::sized::bits<word_bits>::uint;
     static constexpr int F_rounds = 12;
     static constexpr int block_bytes = 128; // bb
     static constexpr int max_hash_bytes = 64; // nn