diff --git a/package-lock.json b/package-lock.json
index 7b307a7..6266cc9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "3.4.1",
       "license": "MIT",
       "dependencies": {
-        "@types/lodash": "^4.14.104",
+        "@types/lodash": "^4.17.20",
         "lodash": "^4.17.5",
         "ts-deepmerge": "^2.0.1"
       },
@@ -2811,9 +2811,10 @@
       }
     },
     "node_modules/@types/lodash": {
-      "version": "4.14.161",
-      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.14.161.tgz",
-      "integrity": "sha512-EP6O3Jkr7bXvZZSZYlsgt5DIjiGr0dXP1/jVEwVLTFgg0d+3lWVQkRavYVQszV7dYUwvg0B8R0MBDpcmXg7XIA=="
+      "version": "4.17.20",
+      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.17.20.tgz",
+      "integrity": "sha512-H3MHACvFUEiujabxhaI/ImO6gUrd8oOurg7LQtS7mbwIXA/cUqWrvBsaeJ23aZEPk1TAYkurjfMbSELfoCXlGA==",
+      "license": "MIT"
     },
     "node_modules/@types/long": {
       "version": "4.0.1",
@@ -16581,9 +16582,9 @@
       }
     },
     "@types/lodash": {
-      "version": "4.14.161",
-      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.14.161.tgz",
-      "integrity": "sha512-EP6O3Jkr7bXvZZSZYlsgt5DIjiGr0dXP1/jVEwVLTFgg0d+3lWVQkRavYVQszV7dYUwvg0B8R0MBDpcmXg7XIA=="
+      "version": "4.17.20",
+      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.17.20.tgz",
+      "integrity": "sha512-H3MHACvFUEiujabxhaI/ImO6gUrd8oOurg7LQtS7mbwIXA/cUqWrvBsaeJ23aZEPk1TAYkurjfMbSELfoCXlGA=="
     },
     "@types/long": {
       "version": "4.0.1",
diff --git a/package.json b/package.json
index b0d7628..028c78c 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   },
   "homepage": "https://github.com/firebase/firebase-functions-test#readme",
   "dependencies": {
-    "@types/lodash": "^4.14.104",
+    "@types/lodash": "^4.17.20",
     "lodash": "^4.17.5",
     "ts-deepmerge": "^2.0.1"
   },