diff --git a/src/valuehash/impl.clj b/src/valuehash/impl.clj
index 42e4888..ed839b5 100644
--- a/src/valuehash/impl.clj
+++ b/src/valuehash/impl.clj
@@ -1,6 +1,7 @@
 (ns valuehash.impl
   "Simple implementation based on plain byte arrays"
-  (:import [java.util UUID Date]))
+  (:import [java.util UUID Date]
+           [java.math BigDecimal BigInteger]))
 
 (defprotocol CanonicalByteArray
   "An object that can be converted to a canonical byte array, with value
@@ -64,6 +65,12 @@
   (to-byte-array [this] (long->bytes (Double/doubleToLongBits this)))
   clojure.lang.Ratio
   (to-byte-array [this] (long->bytes (Double/doubleToLongBits (double this))))
+  clojure.lang.BigInt
+  (to-byte-array [this] (long->bytes (Double/doubleToLongBits (double this))))
+  BigInteger
+  (to-byte-array [this] (long->bytes (Double/doubleToLongBits (double this))))
+  BigDecimal
+  (to-byte-array [this] (long->bytes (Double/doubleToLongBits (double this))))
   Boolean
   (to-byte-array [this] (byte-array 1 (if this (byte 1) (byte 0))))
   Character