diff --git a/package.json b/package.json
index 8422e2d..b4c305d 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "long": "^4.0.0",
     "moment": "^2.24.0",
     "mysql": "^2.17.1",
-    "nodemailer": "^6.8.0",
+    "nodemailer": "^6.6.1",
     "pm2": "^4.2.1",
     "redis": "^2.8.0"
   },
diff --git a/yarn.lock b/yarn.lock
index 0e2daab..af9d201 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -782,7 +782,7 @@ aelf-block-scan@^0.4.1:
     cross-env "^5.2.0"
     log4js "^3.0.5"
 
-aelf-sdk@^3.2.29, aelf-sdk@^3.2.34:
+aelf-sdk@^3.2.29:
   version "3.2.34"
   resolved "https://registry.yarnpkg.com/aelf-sdk/-/aelf-sdk-3.2.34.tgz#842c9d58ff6d5e5663654af5d0331d93683d8c16"
   integrity sha512-4PhuPw9kZHZvlQFiGVEZjrLLnb4ImxidZTBv/bgyogeWCZNpRvs2jXv/hhrIE0jx/BMHmGQuW7enIBK7P533zg==
@@ -804,6 +804,28 @@ aelf-sdk@^3.2.29, aelf-sdk@^3.2.34:
     scryptsy "^2.1.0"
     xmlhttprequest "^1.8.0"
 
+aelf-sdk@^3.2.40:
+  version "3.2.40"
+  resolved "https://registry.yarnpkg.com/aelf-sdk/-/aelf-sdk-3.2.40.tgz#57064ffe31590f8c7d615224eb664b4c723c87bf"
+  integrity sha512-VhiwX9am5gS1mMnImdwaPuFo/sdABrX1gL1ojCM3ohKN/L4qE+egxGBYHEcVxHbCFo1t54pUB2/w7pA4QMJY2w==
+  dependencies:
+    "@aelfqueen/protobufjs" "^6.8.9"
+    "@babel/runtime" "^7.4.5"
+    assert "^2.0.0"
+    bignumber.js "^9.0.0"
+    bip39 "^3.0.2"
+    browserify-cipher "^1.0.1"
+    bs58 "^4.0.1"
+    buffer "^5.2.1"
+    crypto-js "^3.1.9-1"
+    elliptic "^6.4.1"
+    hdkey "^1.1.1"
+    js-sha256 "^0.9.0"
+    query-string "5.1.1"
+    randombytes "^2.1.0"
+    scryptsy "^2.1.0"
+    xmlhttprequest "^1.8.0"
+
 agent-base@4, agent-base@^4.2.0, agent-base@^4.3.0:
   version "4.3.0"
   resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.3.0.tgz#8165f01c436009bccad0b1d122f05ed770efc6ee"
@@ -5246,10 +5268,10 @@ node-pre-gyp@^0.12.0:
     semver "^5.3.0"
     tar "^4"
 
-nodemailer@^6.3.0:
-  version "6.4.0"
-  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.4.0.tgz#91482ebc09d39156d933eb9e6159642cd27bf02c"
-  integrity sha512-UBqPOfQGD1cM3HnjhuQe+0u3DWx47WWK7lBjG5UtPnGOysr7oDK5lNCzcjK6zzeBSdTk4m1tGx1xNbWFZQmMNA==
+nodemailer@^6.6.1:
+  version "6.6.1"
+  resolved "https://registry.yarnpkg.com/nodemailer/-/nodemailer-6.6.1.tgz#2a05fbf205b897d71bf43884167b5d4d3bd01b99"
+  integrity sha512-1xzFN3gqv+/qJ6YRyxBxfTYstLNt0FCtZaFRvf4Sg9wxNGWbwFmGXVpfSi6ThGK6aRxAo+KjHtYSW8NvCsNSAg==
 
 nopt@^4.0.1:
   version "4.0.1"