diff --git a/example/package.json b/example/package.json
index eba3f9d..cc9c22c 100644
--- a/example/package.json
+++ b/example/package.json
@@ -6,7 +6,7 @@
   "dependencies": {
     "@material-ui/core": "^3.6.1",
     "@material-ui/icons": "^3.0.1",
-    "aws-sdk": "^2.373.0",
+    "aws-sdk": "^2.814.0",
     "koa": "^2.6.2",
     "koa-bodyparser": "^4.2.1",
     "koa-router": "^7.4.0",
diff --git a/example/yarn.lock b/example/yarn.lock
index af4212d..936a138 100644
--- a/example/yarn.lock
+++ b/example/yarn.lock
@@ -1539,19 +1539,19 @@ autoprefixer@^9.3.1:
     postcss "^7.0.7"
     postcss-value-parser "^3.3.1"
 
-aws-sdk@^2.373.0:
-  version "2.384.0"
-  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.384.0.tgz#c8fdce7c72f068f6d8b198b53cf33b6f35f3e811"
-  integrity sha512-E+pIOWFNhQH7GCkOl5GU+Vl42MlaKtAq0Yenaa2fRGult9097u7TnUx45V1pNKMCN9RnEFWQy3ZH1TEPEYJ0fw==
+aws-sdk@^2.814.0:
+  version "2.814.0"
+  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.814.0.tgz#7a1c36006e0b5826f14bd2511b1d229ef6814bb0"
+  integrity sha512-empd1m/J/MAkL6d9OeRpmg9thobULu0wk4v8W3JToaxGi2TD7PIdvE6yliZKyOVAdJINhBWEBhxR4OUIHhcGbQ==
   dependencies:
-    buffer "4.9.1"
+    buffer "4.9.2"
     events "1.1.1"
-    ieee754 "1.1.8"
+    ieee754 "1.1.13"
     jmespath "0.15.0"
     querystring "0.2.0"
     sax "1.2.1"
     url "0.10.3"
-    uuid "3.1.0"
+    uuid "3.3.2"
     xml2js "0.4.19"
 
 aws-sign2@~0.7.0:
@@ -2089,10 +2089,10 @@ buffer-xor@^1.0.3:
   resolved "https://registry.yarnpkg.com/buffer-xor/-/buffer-xor-1.0.3.tgz#26e61ed1422fb70dd42e6e36729ed51d855fe8d9"
   integrity sha1-JuYe0UIvtw3ULm42cp7VHYVf6Nk=
 
-buffer@4.9.1, buffer@^4.3.0:
-  version "4.9.1"
-  resolved "https://registry.yarnpkg.com/buffer/-/buffer-4.9.1.tgz#6d1bb601b07a4efced97094132093027c95bc298"
-  integrity sha1-bRu2AbB6TvztlwlBMgkwJ8lbwpg=
+buffer@4.9.2, buffer@^4.3.0:
+  version "4.9.2"
+  resolved "https://registry.yarnpkg.com/buffer/-/buffer-4.9.2.tgz#230ead344002988644841ab0244af8c44bbe3ef8"
+  integrity sha512-xq+q3SRMOxGivLhBNaUdC64hDTQwejJ+H0T/NB1XMtTVEwNTrfFF3gAxiyW0Bu/xWEGhjVKgUcMhCrUy2+uCWg==
   dependencies:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
@@ -4862,15 +4862,10 @@ identity-obj-proxy@3.0.0:
   dependencies:
     harmony-reflect "^1.4.6"
 
-ieee754@1.1.8:
-  version "1.1.8"
-  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.8.tgz#be33d40ac10ef1926701f6f08a2d86fbfd1ad3e4"
-  integrity sha1-vjPUCsEO8ZJnAfbwii2G+/0a0+Q=
-
-ieee754@^1.1.4:
-  version "1.1.12"
-  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.12.tgz#50bf24e5b9c8bb98af4964c941cdb0918da7b60b"
-  integrity sha512-GguP+DRY+pJ3soyIiGPTvdiVXjZ+DbXOxGpXn3eMvNW4x4irjqXm4wHKscC+TfxSJ0yw/S1F24tqdMNsMZTiLA==
+ieee754@1.1.13, ieee754@^1.1.4:
+  version "1.1.13"
+  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.13.tgz#ec168558e95aa181fd87d37f55c32bbcb6708b84"
+  integrity sha512-4vf7I2LYV/HaWerSo3XmlMkp5eZ83i+/CDluXi/IGTs/O1sejBNhTtnxzmRZfvOUqj7lZjqHkeTvpgSFDlWZTg==
 
 iferr@^0.1.5:
   version "0.1.5"
@@ -10133,12 +10128,7 @@ utils-merge@1.0.1:
   resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
   integrity sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=
 
-uuid@3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.1.0.tgz#3dd3d3e790abc24d7b0d3a034ffababe28ebbc04"
-  integrity sha512-DIWtzUkw04M4k3bf1IcpS2tngXEL26YUD2M0tMDUpnUrz2hgzUBlD55a4FjdLGPvfHxS6uluGWvaVEqgBcVa+g==
-
-uuid@^3.0.1, uuid@^3.3.2:
+uuid@3.3.2, uuid@^3.0.1, uuid@^3.3.2:
   version "3.3.2"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"
   integrity sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==