diff --git a/package-lock.json b/package-lock.json
index a98dc65..793822c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -189,7 +189,8 @@
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-      "integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY="
+      "integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY=",
+      "optional": true
     },
     "asn1": {
       "version": "0.2.4",
@@ -496,14 +497,6 @@
         "strip-bom": "^3.0.0"
       }
     },
-    "define-properties": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.3.tgz",
-      "integrity": "sha512-3MqfYKj2lLzdMSf8ZIZE/V+Zuy+BgD6f164e8K2w7dgnpKArBDerGYpM46IYYcjnkdPNMjPk9A6VFB8+3SKlXQ==",
-      "requires": {
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-      }
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       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
@@ -648,23 +641,30 @@
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     "express-handlebars": {
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-      "resolved": "https://registry.npmjs.org/express-handlebars/-/express-handlebars-4.0.4.tgz",
-      "integrity": "sha512-WxbQorVc7V9ORzp9YpG3fLAzrfIrKcScSezuFxTZRFJSx/P2f7QJ9ZyADV8cyPuomyzUxAJnw6t8dnriLfBNvg==",
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/express-handlebars/-/express-handlebars-5.3.1.tgz",
+      "integrity": "sha512-mHpf3PAYysgo6M2yl/r0p5ui/gHwVa7vLBgA3ht8HlNxRGcwXSAGOwKAtAEVdHs4j7FDb5ZGsAJoA8nFaogbGw==",
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-        "graceful-fs": "^4.2.4",
-        "handlebars": "^4.7.6",
-        "object.assign": "^4.1.0",
-        "promise": "^8.1.0"
+        "graceful-fs": "^4.2.6",
+        "handlebars": "^4.7.7"
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-        "promise": {
-          "version": "8.1.0",
-          "resolved": "https://registry.npmjs.org/promise/-/promise-8.1.0.tgz",
-          "integrity": "sha512-W04AqnILOL/sPRXziNicCjSNRruLAuIHEOVBazepu0545DDNGYHz7ar9ZgZ1fMU8/MA4mVxp5rkBWRi6OXIy3Q==",
+        "graceful-fs": {
+          "version": "4.2.9",
+          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.9.tgz",
+          "integrity": "sha512-NtNxqUcXgpW2iMrfqSfR73Glt39K+BLwWsPs94yR63v45T0Wbej7eRmL5cWfwEgqXnmjQp3zaJTshdRW/qC2ZQ=="
+        },
+        "handlebars": {
+          "version": "4.7.7",
+          "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.7.7.tgz",
+          "integrity": "sha512-aAcXm5OAfE/8IXkcZvCepKU3VzW1/39Fb5ZuqMtgI/hT8X2YgoMvBY5dLhq/cpOvw7Lk1nK/UF71aLG/ZnVYRA==",
           "requires": {
-            "asap": "~2.0.6"
+            "minimist": "^1.2.5",
+            "neo-async": "^2.6.0",
+            "source-map": "^0.6.1",
+            "uglify-js": "^3.1.4",
+            "wordwrap": "^1.0.0"
           }
         }
       }
@@ -854,11 +854,6 @@
       "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
       "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0="
     },
-    "has-symbols": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.1.tgz",
-      "integrity": "sha512-PLcsoqu++dmEIZB+6totNFKq/7Do+Z0u4oT0zKOJNl3lYK6vGwwu2hjHs+68OEZbTjiUE9bgOABXbP/GvrS0Kg=="
-    },
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       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/hasha/-/hasha-3.0.0.tgz",
@@ -1440,22 +1435,6 @@
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       "optional": true
     },
-    "object-keys": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.1.1.tgz",
-      "integrity": "sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA=="
-    },
-    "object.assign": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/object.assign/-/object.assign-4.1.0.tgz",
-      "integrity": "sha512-exHJeq6kBKj58mqGyTQ9DFvrZC/eR6OwxzoM9YRoGBqrXYonaFyGiFMuc9VZrXf7DarreEwMpurG3dd+CNyW5w==",
-      "requires": {
-        "define-properties": "^1.1.2",
-        "function-bind": "^1.1.1",
-        "has-symbols": "^1.0.0",
-        "object-keys": "^1.0.11"
-      }
-    },
     "on-finished": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.3.0.tgz",
diff --git a/package.json b/package.json
index d5b5986..b93f927 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "env-var": "^6.2.0",
     "express": "~4.17.0",
     "express-basic-auth": "^1.2.0",
-    "express-handlebars": "^4.0.0",
+    "express-handlebars": "^5.3.1",
     "hbs": "~4.1.1",
     "http-errors": "~1.6.3",
     "jquery": "^3.5.0",