diff --git a/app/api.rb b/app/api.rb
index ebac1f9a..e61868a5 100644
--- a/app/api.rb
+++ b/app/api.rb
@@ -32,6 +32,7 @@ get '/api/list' do
     new_file[:is_directory] = file[:is_directory]
     new_file[:size] = file[:size] unless file[:is_directory]
     new_file[:updated_at] = file[:updated_at].rfc2822
+    new_file[:sha1_hash] = file[:sha1_hash] unless file[:is_directory]
     files << new_file
   end
 
diff --git a/tests/api_tests.rb b/tests/api_tests.rb
index 433d2ccb..462eb91d 100644
--- a/tests/api_tests.rb
+++ b/tests/api_tests.rb
@@ -37,6 +37,7 @@ describe 'api list' do
       site_file[:is_directory].must_equal file[:is_directory]
       site_file[:size].must_equal file[:size]
       site_file[:updated_at].rfc2822.must_equal file[:updated_at]
+      site_file[:sha1_hash].must_equal file[:sha1_hash]
     end
   end
 
diff --git a/views/api.erb b/views/api.erb
index bc5bd8d6..8c2a95da 100644
--- a/views/api.erb
+++ b/views/api.erb
@@ -110,13 +110,15 @@ api.delete(['img1.jpg', 'img2.jpg'], function(resp) {
       "path": "index.html",
       "is_directory": false,
       "size": 1023,
-      "updated_at": "Sat, 13 Feb 2016 03:04:00 -0000"
+      "updated_at": "Sat, 13 Feb 2016 03:04:00 -0000",
+      "sha1_hash": "c8aac06f343c962a24a7eb111aad739ff48b7fb1"
     },
     {
       "path": "not_found.html",
       "is_directory": false,
       "size": 271,
-      "updated_at": "Sat, 13 Feb 2016 03:04:00 -0000"
+      "updated_at": "Sat, 13 Feb 2016 03:04:00 -0000",
+      "sha1_hash": "cfdf0bda2557c322be78302da23c32fec72ffc0b"
     },
     {
       "path": "images",
@@ -127,7 +129,8 @@ api.delete(['img1.jpg', 'img2.jpg'], function(resp) {
       "path": "images/cat.png",
       "is_directory": false,
       "size": 16793,
-      "updated_at": "Sat, 13 Feb 2016 03:04:00 -0000"
+      "updated_at": "Sat, 13 Feb 2016 03:04:00 -0000",
+      "sha1_hash": "41fe08fc0dd44e79f799d03ece903e62be25dc7d"
     }
   ]
 }
@@ -141,7 +144,8 @@ api.delete(['img1.jpg', 'img2.jpg'], function(resp) {
       "path": "images/cat.png",
       "is_directory": false,
       "size": 16793,
-      "updated_at": "Sat, 13 Feb 2016 03:04:00 -0000"
+      "updated_at": "Sat, 13 Feb 2016 03:04:00 -0000",
+      "sha1_hash": "41fe08fc0dd44e79f799d03ece903e62be25dc7d"
     }
   ]
 }