diff --git a/package-lock.json b/package-lock.json
index ec5500c..bc6067c 100644
--- a/package-lock.json
+++ b/package-lock.json
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+              "requires": {
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+                "inflight": "^1.0.4",
+                "inherits": "2",
+                "minimatch": "^3.0.4",
+                "once": "^1.3.0",
+                "path-is-absolute": "^1.0.0"
+              }
+            }
           }
         },
         "safe-buffer": {
           "version": "5.1.2",
-          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+          "bundled": true
         },
         "safer-buffer": {
           "version": "2.1.2",
-          "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
-          "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
+          "bundled": true
         },
         "sax": {
           "version": "1.2.4",
-          "resolved": "https://registry.npmjs.org/sax/-/sax-1.2.4.tgz",
-          "integrity": "sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw=="
+          "bundled": true
         },
         "semver": {
-          "version": "5.6.0",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-5.6.0.tgz",
-          "integrity": "sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg=="
+          "version": "5.7.0",
+          "bundled": true
         },
         "set-blocking": {
           "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
-          "integrity": "sha1-BF+XgtARrppoA93TgrJDkrPYkPc="
+          "bundled": true
         },
         "signal-exit": {
           "version": "3.0.2",
-          "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz",
-          "integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0="
+          "bundled": true
         },
         "string-width": {
           "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
-          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "bundled": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -4331,29 +4282,25 @@
         },
         "string_decoder": {
           "version": "1.1.1",
-          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
-          "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+          "bundled": true,
           "requires": {
             "safe-buffer": "~5.1.0"
           }
         },
         "strip-ansi": {
           "version": "3.0.1",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
-          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+          "bundled": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
         },
         "strip-json-comments": {
           "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
-          "integrity": "sha1-PFMZQukIwml8DsNEhYwobHygpgo="
+          "bundled": true
         },
         "tar": {
           "version": "4.4.8",
-          "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.8.tgz",
-          "integrity": "sha512-LzHF64s5chPQQS0IYBn9IN5h3i98c12bo4NCO7e0sGM2llXQ3p2FGC5sdENN4cTW48O915Sh+x+EXx7XW96xYQ==",
+          "bundled": true,
           "requires": {
             "chownr": "^1.1.1",
             "fs-minipass": "^1.2.5",
@@ -4366,26 +4313,22 @@
         },
         "util-deprecate": {
           "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-          "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+          "bundled": true
         },
         "wide-align": {
           "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
-          "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
+          "bundled": true,
           "requires": {
             "string-width": "^1.0.2 || 2"
           }
         },
         "wrappy": {
           "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-          "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+          "bundled": true
         },
         "yallist": {
           "version": "3.0.3",
-          "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
-          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
+          "bundled": true
         }
       }
     },
@@ -6118,45 +6061,6 @@
         "bytebuffer": "~5",
         "glob": "^7.0.5",
         "yargs": "^3.10.0"
-      },
-      "dependencies": {
-        "camelcase": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-2.1.1.tgz",
-          "integrity": "sha1-fB0W1nmhu+WcoCys7PsBHiAfWh8="
-        },
-        "is-fullwidth-code-point": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
-          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
-          "requires": {
-            "number-is-nan": "^1.0.0"
-          }
-        },
-        "string-width": {
-          "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
-          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
-          "requires": {
-            "code-point-at": "^1.0.0",
-            "is-fullwidth-code-point": "^1.0.0",
-            "strip-ansi": "^3.0.0"
-          }
-        },
-        "yargs": {
-          "version": "3.32.0",
-          "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.32.0.tgz",
-          "integrity": "sha1-AwiOnr+edWtpdRYR0qXvWRSCyZU=",
-          "requires": {
-            "camelcase": "^2.0.1",
-            "cliui": "^3.0.3",
-            "decamelize": "^1.1.1",
-            "os-locale": "^1.4.0",
-            "string-width": "^1.0.1",
-            "window-size": "^0.1.4",
-            "y18n": "^3.2.0"
-          }
-        }
       }
     },
     "protocols": {
diff --git a/package.json b/package.json
index 3a9c228..83b0ea4 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "@nestjs/core": "5.4.1",
     "@nestjs/microservices": "5.4.1",
     "@nestjs/typeorm": "5.2.2",
-    "grpc": "1.17.0-pre1",
+    "grpc": "1.20.3",
     "moment": "2.22.2",
     "pg": "7.7.1",
     "reflect-metadata": "0.1.12",
diff --git a/yarn.lock b/yarn.lock
index d32df33..af6f180 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2282,17 +2282,7 @@ graphlib@^2.1.1, graphlib@^2.1.5:
   dependencies:
     lodash "^4.17.5"
 
-grpc@1.17.0-pre1:
-  version "1.17.0-pre1"
-  resolved "https://registry.yarnpkg.com/grpc/-/grpc-1.17.0-pre1.tgz#e6975778ec04f01f31dd056c7447ce7c21eb6156"
-  dependencies:
-    lodash.camelcase "^4.3.0"
-    lodash.clone "^4.5.0"
-    nan "^2.0.0"
-    node-pre-gyp "^0.12.0"
-    protobufjs "^5.0.3"
-
-grpc@^1.1.2:
+grpc@1.20.3, grpc@^1.1.2:
   version "1.20.3"
   resolved "https://registry.yarnpkg.com/grpc/-/grpc-1.20.3.tgz#a74d36718f1e89c4a64f2fb9441199c3c8f78978"
   dependencies:
@@ -3191,14 +3181,14 @@ mz@^2.4.0, mz@^2.6.0:
     object-assign "^4.0.1"
     thenify-all "^1.0.0"
 
-nan@^2.0.0, nan@^2.9.2:
-  version "2.11.1"
-  resolved "https://registry.yarnpkg.com/nan/-/nan-2.11.1.tgz#90e22bccb8ca57ea4cd37cc83d3819b52eea6766"
-
 nan@^2.13.2:
   version "2.13.2"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.13.2.tgz#f51dc7ae66ba7d5d55e1e6d4d8092e802c9aefe7"
 
+nan@^2.9.2:
+  version "2.11.1"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.11.1.tgz#90e22bccb8ca57ea4cd37cc83d3819b52eea6766"
+
 nanomatch@^1.2.9:
   version "1.2.13"
   resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
@@ -3279,21 +3269,6 @@ node-pre-gyp@^0.10.0:
     semver "^5.3.0"
     tar "^4"
 
-node-pre-gyp@^0.12.0:
-  version "0.12.0"
-  resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.12.0.tgz#39ba4bb1439da030295f899e3b520b7785766149"
-  dependencies:
-    detect-libc "^1.0.2"
-    mkdirp "^0.5.1"
-    needle "^2.2.1"
-    nopt "^4.0.1"
-    npm-packlist "^1.1.6"
-    npmlog "^4.0.2"
-    rc "^1.2.7"
-    rimraf "^2.6.1"
-    semver "^5.3.0"
-    tar "^4"
-
 node-pre-gyp@^0.13.0:
   version "0.13.0"
   resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.13.0.tgz#df9ab7b68dd6498137717838e4f92a33fc9daa42"