diff --git a/package.json b/package.json
index 56b9b086e..4704c6a95 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "nodemon": "1.18.9",
     "prettier": "1.15.3",
     "prettier-check": "2.0.0",
-    "supertest": "3.4.0",
+    "supertest": "3.4.1",
     "vuepress": "0.14.8",
     "yorkie": "2.0.0"
   },
diff --git a/yarn.lock b/yarn.lock
index 058cfe0a5..46489aad5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2479,7 +2479,7 @@ cookie@0.3.1:
   resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.3.1.tgz#e7e0a1f9ef43b4c8ba925c5c5a96e806d16873bb"
   integrity sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=
 
-cookiejar@^2.1.2:
+cookiejar@^2.1.0:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/cookiejar/-/cookiejar-2.1.2.tgz#dd8a235530752f988f9a0844f3fc589e3111125c"
   integrity sha512-Mw+adcfzPxcPeI+0WlvRrr/3lGVO0bD75SxX6811cxSh1Wbxx7xZBGK1eVtDf6si8rg2lhnUjsVLMFMfbRIuwA==
@@ -2857,13 +2857,6 @@ debug@^3.1.0:
   dependencies:
     ms "^2.1.1"
 
-debug@^4.1.0:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
-  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
-  dependencies:
-    ms "^2.1.1"
-
 decamelize-keys@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/decamelize-keys/-/decamelize-keys-1.1.0.tgz#d171a87933252807eb3cb61dc1c1445d078df2d9"
@@ -3643,7 +3636,7 @@ extend-shallow@^3.0.0, extend-shallow@^3.0.2:
     assign-symbols "^1.0.0"
     is-extendable "^1.0.1"
 
-extend@^3.0.1, extend@~3.0.2:
+extend@^3.0.0, extend@^3.0.1, extend@~3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
   integrity sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==
@@ -3926,7 +3919,7 @@ forever-agent@~0.6.1:
   resolved "https://registry.yarnpkg.com/forever-agent/-/forever-agent-0.6.1.tgz#fbc71f0c41adeb37f96c577ad1ed42d8fdacca91"
   integrity sha1-+8cfDEGt6zf5bFd60e1C2P2sypE=
 
-form-data@^2.3.2, form-data@^2.3.3, form-data@~2.3.2:
+form-data@^2.3.1, form-data@^2.3.2, form-data@~2.3.2:
   version "2.3.3"
   resolved "https://registry.yarnpkg.com/form-data/-/form-data-2.3.3.tgz#dcce52c05f644f298c6a7ab936bd724ceffbf3a6"
   integrity sha512-1lLKB2Mu3aGP1Q/2eCOx0fNbRMe7XdwktwOruhfqqd0rIJWwN4Dh+E3hrPSlDCXnSR7UtZ1N38rVXm+6+MEhJQ==
@@ -6476,12 +6469,12 @@ mime-types@^2.1.12, mime-types@^2.1.18, mime-types@~2.1.18, mime-types@~2.1.19:
   dependencies:
     mime-db "~1.37.0"
 
-mime@^1.3.4:
+mime@^1.3.4, mime@^1.4.1:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
   integrity sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==
 
-mime@^2.0.3, mime@^2.2.0, mime@^2.3.1, mime@^2.4.0:
+mime@^2.0.3, mime@^2.2.0, mime@^2.3.1:
   version "2.4.0"
   resolved "https://registry.yarnpkg.com/mime/-/mime-2.4.0.tgz#e051fd881358585f3279df333fe694da0bcffdd6"
   integrity sha512-ikBcWwyqXQSHKtciCcctu9YfPbFYZ4+gbHEmE0Q8jzcTYQg5dHCr3g2wwAZjPoJfQVXZq6KXAjpXOTf5/cjT7w==
@@ -8007,7 +8000,7 @@ q@^1.0.1, q@^1.1.2:
   resolved "https://registry.yarnpkg.com/q/-/q-1.5.1.tgz#7e32f75b41381291d04611f1bf14109ac00651d7"
   integrity sha1-fjL3W0E4EpHQRhHxvxQQmsAGUdc=
 
-qs@^6.5.2, qs@^6.6.0:
+qs@^6.5.1, qs@^6.5.2:
   version "6.6.0"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.6.0.tgz#a99c0f69a8d26bf7ef012f871cdabb0aee4424c2"
   integrity sha512-KIJqT9jQJDQx5h5uAVPimw6yVg2SekOKu959OCtktD3FjzbpvaPr8i4zzg07DOMz+igA4W/aNM7OV8H37pFYfA==
@@ -9189,28 +9182,29 @@ stylus@^0.54.5:
     sax "0.5.x"
     source-map "0.1.x"
 
-superagent@^4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/superagent/-/superagent-4.1.0.tgz#c465c2de41df2b8d05c165cbe403e280790cdfd5"
-  integrity sha512-FT3QLMasz0YyCd4uIi5HNe+3t/onxMyEho7C3PSqmti3Twgy2rXT4fmkTz6wRL6bTF4uzPcfkUCa8u4JWHw8Ag==
+superagent@^3.8.3:
+  version "3.8.3"
+  resolved "https://registry.yarnpkg.com/superagent/-/superagent-3.8.3.tgz#460ea0dbdb7d5b11bc4f78deba565f86a178e128"
+  integrity sha512-GLQtLMCoEIK4eDv6OGtkOoSMt3D+oq0y3dsxMuYuDvaNUvuT8eFBuLmfR0iYYzHC1e8hpzC6ZsxbuP6DIalMFA==
   dependencies:
     component-emitter "^1.2.0"
-    cookiejar "^2.1.2"
-    debug "^4.1.0"
-    form-data "^2.3.3"
+    cookiejar "^2.1.0"
+    debug "^3.1.0"
+    extend "^3.0.0"
+    form-data "^2.3.1"
     formidable "^1.2.0"
     methods "^1.1.1"
-    mime "^2.4.0"
-    qs "^6.6.0"
-    readable-stream "^3.0.6"
+    mime "^1.4.1"
+    qs "^6.5.1"
+    readable-stream "^2.3.5"
 
-supertest@3.4.0:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/supertest/-/supertest-3.4.0.tgz#4f1d9db50ccdda23382fde5376f3f34ea8eb90f9"
-  integrity sha512-X3RKdIE4asSnJ+xi81tFne4BlYTOEq6W+6vKwl8zCMWQ15mQh+e/BGNF2duEjLXSsKP+VChyh6WSp+444Do6Gg==
+supertest@3.4.1:
+  version "3.4.1"
+  resolved "https://registry.yarnpkg.com/supertest/-/supertest-3.4.1.tgz#91b19ea34804c205769d0ff5ad947aff3eb2731d"
+  integrity sha512-r4AmsjjKxC50LxGACe/E4xKjau2amiFlj3aCT2sZCRig2o3l4XFN6Acw7crDu4d8Af1f5chafIyLkQ1mac/boA==
   dependencies:
     methods "^1.1.2"
-    superagent "^4.1.0"
+    superagent "^3.8.3"
 
 supports-color@^2.0.0:
   version "2.0.0"