diff --git a/backend/yarn.lock b/backend/yarn.lock
index e22a94d..f232c27 100644
--- a/backend/yarn.lock
+++ b/backend/yarn.lock
@@ -8,10 +8,6 @@
   dependencies:
     regenerator-runtime "^0.13.2"
 
-"@types/bcrypt@^3.0.0":
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/@types/bcrypt/-/bcrypt-3.0.0.tgz#851489a9065a067cb7f3c9cbe4ce9bed8bba0876"
-
 "@types/body-parser@*":
   version "1.17.0"
   resolved "https://registry.yarnpkg.com/@types/body-parser/-/body-parser-1.17.0.tgz#9f5c9d9bd04bb54be32d5eb9fc0d8c974e6cf58c"
@@ -37,6 +33,16 @@
   dependencies:
     "@types/express" "*"
 
+"@types/cors@^2.8.5":
+  version "2.8.12"
+  resolved "https://registry.yarnpkg.com/@types/cors/-/cors-2.8.12.tgz#6b2c510a7ad7039e98e7b8d3d6598f4359e5c080"
+
+"@types/dotenv@^6.1.1":
+  version "6.1.1"
+  resolved "https://registry.yarnpkg.com/@types/dotenv/-/dotenv-6.1.1.tgz#f7ce1cc4fe34f0a4373ba99fefa437b0bec54b46"
+  dependencies:
+    "@types/node" "*"
+
 "@types/express-serve-static-core@*":
   version "4.16.4"
   resolved "https://registry.yarnpkg.com/@types/express-serve-static-core/-/express-serve-static-core-4.16.4.tgz#56bb8be4559401d68af4a3624ae9dd3166103e60"
@@ -70,12 +76,6 @@
   version "14.2.0"
   resolved "https://registry.yarnpkg.com/@types/graphql/-/graphql-14.2.0.tgz#74e1da5f2a4a744ac6eb3ed57b48242ea9367202"
 
-"@types/jsonwebtoken@^8.3.2":
-  version "8.3.2"
-  resolved "https://registry.yarnpkg.com/@types/jsonwebtoken/-/jsonwebtoken-8.3.2.tgz#e3d5245197152346fae7ee87d5541aa5a92d0362"
-  dependencies:
-    "@types/node" "*"
-
 "@types/lodash.groupby@^4.6.4":
   version "4.6.6"
   resolved "https://registry.yarnpkg.com/@types/lodash.groupby/-/lodash.groupby-4.6.6.tgz#4d9b61a4d8b0d83d384975cabfed4c1769d6792e"
@@ -264,12 +264,12 @@ aws-lambda@^0.1.2:
     dotenv "^0.4.0"
 
 aws-sdk@^*:
-  version "2.452.0"
-  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.452.0.tgz#b33c29c4250d45a803f9b8b26dedacc96f60699d"
+  version "2.1030.0"
+  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.1030.0.tgz#24a856af3d2b8b37c14a8f59974993661c66fd82"
   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"
@@ -286,8 +286,8 @@ balanced-match@^1.0.0:
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
 
 base64-js@^1.0.2:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.3.0.tgz#cab1e6118f051095e58b5281aea8c1cd22bfc0e3"
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/base64-js/-/base64-js-1.5.1.tgz#1b1b440160a5bf7ad40b650f095963481903930a"
 
 bcrypt@^3.0.6:
   version "3.0.6"
@@ -347,9 +347,9 @@ buffer-from@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
 
-buffer@4.9.1:
-  version "4.9.1"
-  resolved "https://registry.yarnpkg.com/buffer/-/buffer-4.9.1.tgz#6d1bb601b07a4efced97094132093027c95bc298"
+buffer@4.9.2:
+  version "4.9.2"
+  resolved "https://registry.yarnpkg.com/buffer/-/buffer-4.9.2.tgz#230ead344002988644841ab0244af8c44bbe3ef8"
   dependencies:
     base64-js "^1.0.2"
     ieee754 "^1.1.4"
@@ -444,7 +444,7 @@ core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
-cors@^2.8.4:
+cors@^2.8.4, cors@^2.8.5:
   version "2.8.5"
   resolved "https://registry.yarnpkg.com/cors/-/cors-2.8.5.tgz#eac11da51592dd86b9f06f6e7ac293b3df875d29"
   dependencies:
@@ -905,14 +905,14 @@ iconv-lite@0.4.24, iconv-lite@^0.4.4:
   dependencies:
     safer-buffer ">= 2.1.2 < 3"
 
-ieee754@1.1.8:
-  version "1.1.8"
-  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.8.tgz#be33d40ac10ef1926701f6f08a2d86fbfd1ad3e4"
-
-ieee754@^1.1.4:
+ieee754@1.1.13:
   version "1.1.13"
   resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.13.tgz#ec168558e95aa181fd87d37f55c32bbcb6708b84"
 
+ieee754@^1.1.4:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.2.1.tgz#8eb7a10a63fff25d15a57b001586d177d1b0d352"
+
 ignore-walk@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/ignore-walk/-/ignore-walk-3.0.1.tgz#a83e62e7d272ac0e3b551aaa82831a19b69f82f8"