diff --git a/package-lock.json b/package-lock.json
index eb8d6dc..fafe787 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.0.8",
       "license": "BSD-3-Clause",
       "dependencies": {
-        "isomorphic-fetch": "^3.0.0",
+        "isomorphic-fetch": "^1.7.0",
         "jsonata": "^1.8.4",
         "jsonwebtoken": "^9.0.2",
         "url-search-params-polyfill": "^7.0.0"
@@ -49,12 +49,12 @@
       }
     },
     "node_modules/isomorphic-fetch": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/isomorphic-fetch/-/isomorphic-fetch-3.0.0.tgz",
-      "integrity": "sha512-qvUtwJ3j6qwsF3jLxkZ72qCgjMysPzDfeV240JHiGZsANBYd+EEuu35v7dfrJ9Up0Ak07D7GGSkGhCHTqg/5wA==",
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/isomorphic-fetch/-/isomorphic-fetch-1.7.0.tgz",
+      "integrity": "sha512-810ZxUH/dOsq84SgdCE+P73I6mZtWhntElwd9lDTophDtU5/j1IpaR9TLdjwNPOGca1Zm2VxtpzAL8E9AjluPg==",
       "dependencies": {
-        "node-fetch": "^2.6.1",
-        "whatwg-fetch": "^3.4.1"
+        "whatwg-fetch": "git+https://github.com/matthew-andrews/fetch#ie9",
+        "xmlhttprequest": "git+https://github.com/matthew-andrews/node-XMLHttpRequest"
       }
     },
     "node_modules/jsonata": {
@@ -145,25 +145,6 @@
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
       "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="
     },
-    "node_modules/node-fetch": {
-      "version": "2.7.0",
-      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.7.0.tgz",
-      "integrity": "sha512-c4FRfUm/dbcWZ7U+1Wq0AwCyFL+3nt2bEw05wfxSz+DWpWsitgmSgYmy2dQdWyKC1694ELPqMs/YzUSNozLt8A==",
-      "dependencies": {
-        "whatwg-url": "^5.0.0"
-      },
-      "engines": {
-        "node": "4.x || >=6.0.0"
-      },
-      "peerDependencies": {
-        "encoding": "^0.1.0"
-      },
-      "peerDependenciesMeta": {
-        "encoding": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/safe-buffer": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
@@ -213,11 +194,6 @@
         "source-map": "^0.6.0"
       }
     },
-    "node_modules/tr46": {
-      "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
-      "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw=="
-    },
     "node_modules/typescript": {
       "version": "3.9.10",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.10.tgz",
@@ -236,23 +212,15 @@
       "resolved": "https://registry.npmjs.org/url-search-params-polyfill/-/url-search-params-polyfill-7.0.1.tgz",
       "integrity": "sha512-bAw7L2E+jn9XHG5P9zrPnHdO0yJub4U+yXJOdpcpkr7OBd9T8oll4lUos0iSGRcDvfZoLUKfx9a6aNmIhJ4+mQ=="
     },
-    "node_modules/webidl-conversions": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
-      "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ=="
-    },
     "node_modules/whatwg-fetch": {
-      "version": "3.6.20",
-      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.6.20.tgz",
-      "integrity": "sha512-EqhiFU6daOA8kpjOWTL0olhVOF3i7OrFzSYiGsEMB8GcXS+RrzauAERX65xMeNWVqxA6HXH2m69Z9LaKKdisfg=="
+      "version": "0.7.0",
+      "resolved": "git+ssh://git@github.com/matthew-andrews/fetch.git#8ebf5cbbc1e8496bf5dc4c48fd38af349106787d"
     },
-    "node_modules/whatwg-url": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
-      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
-      "dependencies": {
-        "tr46": "~0.0.3",
-        "webidl-conversions": "^3.0.0"
+    "node_modules/xmlhttprequest": {
+      "version": "1.7.0",
+      "resolved": "git+ssh://git@github.com/matthew-andrews/node-XMLHttpRequest.git#79a415ca98d689651e4a9f6a1ec0fe71d416b120",
+      "engines": {
+        "node": ">=0.4.0"
       }
     }
   }
diff --git a/package.json b/package.json
index b1c47c8..25661ab 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "lamp": "cli.js"
   },
   "dependencies": {
-    "isomorphic-fetch": "^3.0.0",
+    "isomorphic-fetch": "^1.7.0",
     "jsonata": "^1.8.4",
     "jsonwebtoken": "^9.0.2",
     "url-search-params-polyfill": "^7.0.0"