diff --git a/package-lock.json b/package-lock.json
index 4cacc4a2..9553be12 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2454,8 +2454,7 @@
         },
         "ansi-regex": {
           "version": "2.1.1",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -2473,13 +2472,11 @@
         },
         "balanced-match": {
           "version": "1.0.0",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
-          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -2492,18 +2489,15 @@
         },
         "code-point-at": {
           "version": "1.1.0",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "concat-map": {
           "version": "0.0.1",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "console-control-strings": {
           "version": "1.1.0",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -2606,8 +2600,7 @@
         },
         "inherits": {
           "version": "2.0.3",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "ini": {
           "version": "1.3.5",
@@ -2617,7 +2610,6 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
-          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -2630,20 +2622,17 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
-          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
         },
         "minimist": {
           "version": "0.0.8",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
-          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -2660,7 +2649,6 @@
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
-          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -2733,8 +2721,7 @@
         },
         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -2744,7 +2731,6 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
-          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -2820,8 +2806,7 @@
         },
         "safe-buffer": {
           "version": "5.1.2",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -2851,7 +2836,6 @@
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
-          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -2869,7 +2853,6 @@
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
-          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -2908,13 +2891,11 @@
         },
         "wrappy": {
           "version": "1.0.2",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "yallist": {
           "version": "3.0.3",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         }
       }
     },
@@ -3301,11 +3282,11 @@
       }
     },
     "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": "3.0.0",
+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-3.0.0.tgz",
+      "integrity": "sha512-y4jAxNEihqvBI5F3SaO2rtsjIOnnNA8sEbuiP+UhJZJHeM2NRm6c09ax2tgqme+SgUUvjao2fJXF4h3D6Cb2HQ==",
       "requires": {
-        "agent-base": "^4.1.0",
+        "agent-base": "^4.3.0",
         "debug": "^3.1.0"
       }
     },
diff --git a/package.json b/package.json
index 74e0cda6..d948c399 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "express": "4.17.1",
     "govuk-frontend": "2.13.0",
     "helmet": "3.21.1",
-    "https-proxy-agent": "2.2.1",
+    "https-proxy-agent": "3.0.0",
     "joi": "14.3.1",
     "json2csv": "4.5.3",
     "lodash": "4.17.15",
diff --git a/src/@types/https-proxy-agent.d.ts b/src/@types/https-proxy-agent.d.ts
deleted file mode 100644
index b7503294..00000000
--- a/src/@types/https-proxy-agent.d.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-declare module 'https-proxy-agent' {
-  import * as https from 'https'
-
-  namespace HttpsProxyAgent {
-      interface HttpsProxyAgentOptions {
-          host: string
-          port: number
-          secureProxy?: boolean
-          headers?: {
-              [key: string]: string
-          }
-          [key: string]: any
-      }
-  }
-
-  class HttpsProxyAgent extends https.Agent {
-      constructor(opts: HttpsProxyAgent.HttpsProxyAgentOptions)
-  }
-
-  export = HttpsProxyAgent
-}
\ No newline at end of file