diff --git a/.travis.yml b/.travis.yml
index d99dcc4dc..d9c9b8027 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,7 @@ rvm:
   - 2.1
   - 2.2
   - 2.3.1
+  - 2.4.0-rc1
 
 matrix:
   include:
diff --git a/bin/sprockets b/bin/sprockets
index a3fb6510d..97214c687 100755
--- a/bin/sprockets
+++ b/bin/sprockets
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+$VERBOSE = nil
 
 require 'sprockets'
 require 'optparse'
diff --git a/lib/sprockets/digest_utils.rb b/lib/sprockets/digest_utils.rb
index 2551941f6..7dbcd976f 100644
--- a/lib/sprockets/digest_utils.rb
+++ b/lib/sprockets/digest_utils.rb
@@ -44,12 +44,8 @@ def detect_digest_class(bytes)
         digest << 'Symbol'.freeze
         digest << val.to_s
       },
-      Fixnum => ->(val, digest) {
-        digest << 'Fixnum'.freeze
-        digest << val.to_s
-      },
-      Bignum => ->(val, digest) {
-        digest << 'Bignum'.freeze
+      Integer => ->(val, digest) {
+        digest << 'Integer'.freeze
         digest << val.to_s
       },
       Array => ->(val, digest) {
@@ -73,6 +69,16 @@ def detect_digest_class(bytes)
         digest << val.name
       },
     }
+    if 0.class != Integer # Ruby < 2.4
+      ADD_VALUE_TO_DIGEST[Fixnum] = ->(val, digest) {
+        digest << 'Integer'.freeze
+        digest << val.to_s
+      }
+      ADD_VALUE_TO_DIGEST[Bignum] = ->(val, digest) {
+        digest << 'Integer'.freeze
+        digest << val.to_s
+      }
+    end
     ADD_VALUE_TO_DIGEST.default_proc = ->(_, val) {
       raise TypeError, "couldn't digest #{ val }"
     }
diff --git a/lib/sprockets/processor_utils.rb b/lib/sprockets/processor_utils.rb
index 8b5e3660e..422f9d4eb 100644
--- a/lib/sprockets/processor_utils.rb
+++ b/lib/sprockets/processor_utils.rb
@@ -107,12 +107,10 @@ def processors_cache_keys(processors)
     VALID_METADATA_VALUE_TYPES = Set.new([
       String,
       Symbol,
-      Fixnum,
-      Bignum,
       TrueClass,
       FalseClass,
       NilClass
-    ]).freeze
+    ] + (0.class == Integer ? [Integer] : [Bignum, Fixnum])).freeze
 
     # Internal: Set of all nested compound metadata types that can nest values.
     VALID_METADATA_COMPOUND_TYPES = Set.new([
diff --git a/lib/sprockets/utils.rb b/lib/sprockets/utils.rb
index 4689b628a..11ff9443e 100644
--- a/lib/sprockets/utils.rb
+++ b/lib/sprockets/utils.rb
@@ -14,11 +14,15 @@ module Utils
     #
     # Returns false if .dup would raise a TypeError, otherwise true.
     def duplicable?(obj)
-      case obj
-      when NilClass, FalseClass, TrueClass, Symbol, Numeric
-        false
-      else
+      if RUBY_VERSION >= "2.4.0"
         true
+      else
+        case obj
+        when NilClass, FalseClass, TrueClass, Symbol, Numeric
+          false
+        else
+          true
+        end
       end
     end
 
diff --git a/test/test_digest_utils.rb b/test/test_digest_utils.rb
index 9840af7b5..e8e1764c3 100644
--- a/test/test_digest_utils.rb
+++ b/test/test_digest_utils.rb
@@ -25,16 +25,16 @@ def test_digest
     assert_equal "9bda381dac87b1c16b04f996abb623f43f1cdb89ce8be7dda3f67319dc440bc5", hexdigest(nil)
     assert_equal "92de503a8b413365fc38050c7dd4bacf28b0f705e744dacebcaa89f2032dcd67", hexdigest(true)
     assert_equal "bdfd64a7c8febcc3b0b8fb05d60c8e2a4cb6b8c081fcba20db1c9778e9beaf89", hexdigest(false)
-    assert_equal "0d4af38194cb7dc915a75b04926886f6753ffc5b4f54513adfc582fdf3642e8c", hexdigest(42)
-    assert_equal "abed5dfa575e89eb850242440d64c316071f76de0db48dd8d416f4aa5ece6afd", hexdigest(2 ** 128)
+    assert_equal "291e87109f89e59ad717aebe4ffc9657c700e74da45db789ecd19d6b797baee2", hexdigest(42)
+    assert_equal "d1312b90a6258e9bda7d10e5e1ab1468d92786eca72a65b5ab077169e36bcb1e", hexdigest(2 ** 128)
     assert_equal "2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae", hexdigest("foo")
     assert_equal "dea6712e86478d2ee22a35a8c5ac9627e7cbc5ce2407a7da7c645fea2434fe9b", hexdigest(:foo)
     assert_equal "f0cf39d0be3efbb6f86ac2404100ff7e055c17ded946a06808d66f89ca03a811", hexdigest([])
     assert_equal "ed98cc300019b22ca15e7cd5934028a79e7af4c75f7eeea810f43a3a4353a04d", hexdigest(["foo"])
     assert_equal "54edcfe382f4abaa9ebe93efa9977b05b786c9058496609797989b7fdf8208d4", hexdigest({"foo" => "bar"})
     assert_equal "62427aa539a0b78e90fd710dc0e15f2960771ba44214b5d41d4a93a8b2940a38", hexdigest({"foo" => "baz"})
-    assert_equal "905e6cc86eccb1849ae6c1e0bb01b96fedb3e341ad3d60f828e93e9b5e469a4f", hexdigest([[:foo, 1]])
-    assert_equal "9500d3562922431a8ccce61bd510d341ca8d61cf6b6e5ae620e7b1598436ed73", hexdigest([{:foo => 1}])
+    assert_equal "b6054efd9929004bdd0a1c09eb2d12961325396da749143def3e9a4050aa703e", hexdigest([[:foo, 1]])
+    assert_equal "79a19ffe41ecebd5dc35e95363e0b4aa79b139a22bc650384df57eb09842f099", hexdigest([{:foo => 1}])
     assert_equal "94ee40cca7c2c6d2a134033d2f5a31c488cad5d3dcc61a3dbb5e2a858635874b", hexdigest("foo".force_encoding('UTF-8').encoding)
 
     assert_raises(TypeError) do
diff --git a/test/test_utils.rb b/test/test_utils.rb
index eb49d42a6..04a723361 100644
--- a/test/test_utils.rb
+++ b/test/test_utils.rb
@@ -4,7 +4,24 @@
 class TestUtils < MiniTest::Test
   include Sprockets::Utils
 
-  def test_duplicable
+  def test_duplicable_pre_ruby_2_4
+    skip if RUBY_VERSION >= "2.4"
+
+    objs = [nil, true, false, 1, "foo", :foo, [], {}]
+    objs.each do |obj|
+      begin
+        obj.dup
+      rescue TypeError
+        refute duplicable?(obj), "can't dup: #{obj.inspect}"
+      else
+        assert duplicable?(obj), "can dup: #{obj.inspect}"
+      end
+    end
+  end
+
+  def test_duplicable_post_ruby_2_4
+    skip if RUBY_VERSION < "2.4"
+
     objs = [nil, true, false, 1, "foo", :foo, [], {}]
     objs.each do |obj|
       begin