diff --git a/package-lock.json b/package-lock.json
index 539e476..590233f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1962,11 +1962,6 @@
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     },
-    "graceful-readlink": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz",
-      "integrity": "sha1-TK+tdrxi8C+gObL5Tpo906ORpyU="
-    },
     "grpc": {
       "version": "1.21.1",
       "resolved": "https://registry.npmjs.org/grpc/-/grpc-1.21.1.tgz",
@@ -2593,12 +2588,12 @@
       "integrity": "sha1-ksnBN0w1CF912zWexWzCV8u5P6Q="
     },
     "https-proxy-agent": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-2.2.1.tgz",
-      "integrity": "sha512-HPCTS1LW51bcyMYbxUIOO4HEOlQ1/1qRaFWcyxvwaqUS9TY88aoEuHUY33kuAh1YhVVaDQhLZsnPd+XNARWZlQ==",
+      "version": "2.2.4",
+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-2.2.4.tgz",
+      "integrity": "sha512-OmvfoQ53WLjtA9HeYP9RNrWMJzzAz1JGaSFr1nijg0PVR1JaD/xbJq1mdEIIlxGpXp9eSe/O2LgU9DJmTPd0Eg==",
       "optional": true,
       "requires": {
-        "agent-base": "^4.1.0",
+        "agent-base": "^4.3.0",
         "debug": "^3.1.0"
       },
       "dependencies": {
@@ -3945,14 +3940,6 @@
       "integrity": "sha1-EMCI2LWOsHazIpu1oE4jLOEmQi0=",
       "optional": true
     },
-    "source-map": {
-      "version": "0.4.4",
-      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
-      "integrity": "sha1-66T12pwNyZneaAMti092FzZSA2s=",
-      "requires": {
-        "amdefine": ">=0.0.4"
-      }
-    },
     "sparse-bitfield": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/sparse-bitfield/-/sparse-bitfield-3.0.3.tgz",