diff --git a/migrate-to-firestore/package-lock.json b/migrate-to-firestore/package-lock.json
index 86669b6..fe3e8ca 100644
--- a/migrate-to-firestore/package-lock.json
+++ b/migrate-to-firestore/package-lock.json
@@ -12,7 +12,7 @@
         "@google-cloud/firestore": "^6.0.0",
         "@types/node": "^12.6.8",
         "body-parser": "^1.19.0",
-        "ejs": "^2.5.6",
+        "ejs": "^3.1.10",
         "express": "^4.17.1",
         "mongoose": "^5.6.6",
         "url-parse": "^1.5.3"
@@ -292,6 +292,11 @@
         "node": ">=8"
       }
     },
+    "node_modules/async": {
+      "version": "3.2.5",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.2.5.tgz",
+      "integrity": "sha512-baNZyqaaLhyLVKm/DlvdW051MSgO6b8eVfIezl9E5PqWxFgzLm/wQntEW4zOytVburDEr0JlALEpdOFwvErLsg=="
+    },
     "node_modules/balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
@@ -558,9 +563,15 @@
       "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
     },
     "node_modules/ejs": {
-      "version": "2.5.6",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-2.5.6.tgz",
-      "integrity": "sha1-R5Y2v6P+Ox3r1SCH8KyyBLTxnIg=",
+      "version": "3.1.10",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.10.tgz",
+      "integrity": "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA==",
+      "dependencies": {
+        "jake": "^10.8.5"
+      },
+      "bin": {
+        "ejs": "bin/cli.js"
+      },
       "engines": {
         "node": ">=0.10.0"
       }
@@ -777,6 +788,14 @@
       "resolved": "https://registry.npmjs.org/fast-text-encoding/-/fast-text-encoding-1.0.4.tgz",
       "integrity": "sha512-x6lDDm/tBAzX9kmsPcZsNbvDs3Zey3+scsxaZElS8xWLgUMAg/oFLeewfUz0mu1CblHhhsu15jGkraldkFh8KQ=="
     },
+    "node_modules/filelist": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
+      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
+      "dependencies": {
+        "minimatch": "^5.0.1"
+      }
+    },
     "node_modules/finalhandler": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.2.tgz",
@@ -1068,6 +1087,43 @@
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
       "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
     },
+    "node_modules/jake": {
+      "version": "10.8.7",
+      "resolved": "https://registry.npmjs.org/jake/-/jake-10.8.7.tgz",
+      "integrity": "sha512-ZDi3aP+fG/LchyBzUM804VjddnwfSfsdeYkwt8NcbKRvo4rFkjhs456iLFn3k2ZUWvNe4i48WACDbza8fhq2+w==",
+      "dependencies": {
+        "async": "^3.2.3",
+        "chalk": "^4.0.2",
+        "filelist": "^1.0.4",
+        "minimatch": "^3.1.2"
+      },
+      "bin": {
+        "jake": "bin/cli.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/jake/node_modules/brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dependencies": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "node_modules/jake/node_modules/minimatch": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
+      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
+      "dependencies": {
+        "brace-expansion": "^1.1.7"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
     "node_modules/js2xmlparser": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/js2xmlparser/-/js2xmlparser-4.0.2.tgz",
@@ -2447,6 +2503,11 @@
       "resolved": "https://registry.npmjs.org/arrify/-/arrify-2.0.1.tgz",
       "integrity": "sha512-3duEwti880xqi4eAMN8AyR4a0ByT90zoYdLlevfrvU43vb0YZwZVfxOgxWrLXXXpyugL0hNZc9G6BiB5B3nUug=="
     },
+    "async": {
+      "version": "3.2.5",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.2.5.tgz",
+      "integrity": "sha512-baNZyqaaLhyLVKm/DlvdW051MSgO6b8eVfIezl9E5PqWxFgzLm/wQntEW4zOytVburDEr0JlALEpdOFwvErLsg=="
+    },
     "balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
@@ -2661,9 +2722,12 @@
       "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
     },
     "ejs": {
-      "version": "2.5.6",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-2.5.6.tgz",
-      "integrity": "sha1-R5Y2v6P+Ox3r1SCH8KyyBLTxnIg="
+      "version": "3.1.10",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.10.tgz",
+      "integrity": "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA==",
+      "requires": {
+        "jake": "^10.8.5"
+      }
     },
     "emoji-regex": {
       "version": "8.0.0",
@@ -2826,6 +2890,14 @@
       "resolved": "https://registry.npmjs.org/fast-text-encoding/-/fast-text-encoding-1.0.4.tgz",
       "integrity": "sha512-x6lDDm/tBAzX9kmsPcZsNbvDs3Zey3+scsxaZElS8xWLgUMAg/oFLeewfUz0mu1CblHhhsu15jGkraldkFh8KQ=="
     },
+    "filelist": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
+      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
+      "requires": {
+        "minimatch": "^5.0.1"
+      }
+    },
     "finalhandler": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.2.tgz",
@@ -3045,6 +3117,36 @@
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
       "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
     },
+    "jake": {
+      "version": "10.8.7",
+      "resolved": "https://registry.npmjs.org/jake/-/jake-10.8.7.tgz",
+      "integrity": "sha512-ZDi3aP+fG/LchyBzUM804VjddnwfSfsdeYkwt8NcbKRvo4rFkjhs456iLFn3k2ZUWvNe4i48WACDbza8fhq2+w==",
+      "requires": {
+        "async": "^3.2.3",
+        "chalk": "^4.0.2",
+        "filelist": "^1.0.4",
+        "minimatch": "^3.1.2"
+      },
+      "dependencies": {
+        "brace-expansion": {
+          "version": "1.1.11",
+          "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+          "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+          "requires": {
+            "balanced-match": "^1.0.0",
+            "concat-map": "0.0.1"
+          }
+        },
+        "minimatch": {
+          "version": "3.1.2",
+          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
+          "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
+          "requires": {
+            "brace-expansion": "^1.1.7"
+          }
+        }
+      }
+    },
     "js2xmlparser": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/js2xmlparser/-/js2xmlparser-4.0.2.tgz",
diff --git a/migrate-to-firestore/package.json b/migrate-to-firestore/package.json
index b5d2c19..305cdab 100644
--- a/migrate-to-firestore/package.json
+++ b/migrate-to-firestore/package.json
@@ -22,7 +22,7 @@
     "@google-cloud/firestore": "^6.0.0",
     "@types/node": "^12.6.8",
     "body-parser": "^1.19.0",
-    "ejs": "^2.5.6",
+    "ejs": "^3.1.10",
     "express": "^4.17.1",
     "mongoose": "^5.6.6",
     "url-parse": "^1.5.3"