diff --git a/package-lock.json b/package-lock.json
index ab200ce33..33bcec842 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -431,21 +431,6 @@
       "integrity": "sha1-YXmX/F9gV2iUxDX5QNgZ4TW4B2I=",
       "dev": true
     },
-    "align-text": {
-      "version": "0.1.4",
-      "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
-      "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
-      "requires": {
-        "kind-of": "^3.0.2",
-        "longest": "^1.0.1",
-        "repeat-string": "^1.5.2"
-      }
-    },
-    "amdefine": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
-      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU="
-    },
     "ansi-align": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ansi-align/-/ansi-align-2.0.0.tgz",
@@ -625,9 +610,12 @@
       "dev": true
     },
     "async": {
-      "version": "1.5.2",
-      "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
-      "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo="
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.2.tgz",
+      "integrity": "sha512-H1qVYh1MYhEEFLsP97cVKqCGo7KfCyTt6uEWqsTBr9SO84oK9Uwbyd/yCW+6rKJLHksBNUVWZDAjfS+Ccx0Bbg==",
+      "requires": {
+        "lodash": "^4.17.11"
+      }
     },
     "async-each": {
       "version": "1.0.1",
@@ -1497,12 +1485,6 @@
       "integrity": "sha1-r6uWJikQp/M8GaV3WCXGnzTjUMo=",
       "dev": true
     },
-    "camelcase": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
-      "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=",
-      "optional": true
-    },
     "camelcase-keys": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-4.2.0.tgz",
@@ -1559,16 +1541,6 @@
       "integrity": "sha512-Jt9tIBkRc9POUof7QA/VwWd+58fKkEEfI+/t1/eOlxKM7ZhrczNzMFefge7Ai+39y1pR/pP6cI19guHy3FSLmw==",
       "dev": true
     },
-    "center-align": {
-      "version": "0.1.3",
-      "resolved": "https://registry.npmjs.org/center-align/-/center-align-0.1.3.tgz",
-      "integrity": "sha1-qg0yYptu6XIgBBHL1EYckHvCt60=",
-      "optional": true,
-      "requires": {
-        "align-text": "^0.1.3",
-        "lazy-cache": "^1.0.3"
-      }
-    },
     "chalk": {
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.2.tgz",
@@ -1754,25 +1726,6 @@
         "cookies": "^0.7.0"
       }
     },
-    "cliui": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/cliui/-/cliui-2.1.0.tgz",
-      "integrity": "sha1-S0dXYP+AJkx2LDoXGQMukcf+oNE=",
-      "optional": true,
-      "requires": {
-        "center-align": "^0.1.1",
-        "right-align": "^0.1.1",
-        "wordwrap": "0.0.2"
-      },
-      "dependencies": {
-        "wordwrap": {
-          "version": "0.0.2",
-          "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.2.tgz",
-          "integrity": "sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8=",
-          "optional": true
-        }
-      }
-    },
     "clone-regexp": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/clone-regexp/-/clone-regexp-1.0.1.tgz",
@@ -2152,7 +2105,8 @@
     "decamelize": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
-      "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA="
+      "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=",
+      "dev": true
     },
     "decamelize-keys": {
       "version": "1.1.0",
@@ -3320,11 +3274,6 @@
       "resolved": "https://registry.npmjs.org/foreach/-/foreach-2.0.5.tgz",
       "integrity": "sha1-C+4AUBiusmDQo6865ljdATbsG5k="
     },
-    "foreachasync": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/foreachasync/-/foreachasync-3.0.0.tgz",
-      "integrity": "sha1-VQKYfchxS+M5IJfzLgBxyd7gfPY="
-    },
     "forever-agent": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz",
@@ -4165,35 +4114,14 @@
       "dev": true
     },
     "handlebars": {
-      "version": "4.0.6",
-      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.0.6.tgz",
-      "integrity": "sha1-LORISFBTf5yXqAJtU5m5NcTtTtc=",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.1.0.tgz",
+      "integrity": "sha512-l2jRuU1NAWK6AW5qqcTATWQJvNPEwkM7NEKSiv/gqOsoSQbVoWyqVEY5GS+XPQ88zLNmqASRpzfdm8d79hJS+w==",
       "requires": {
-        "async": "^1.4.0",
+        "async": "^2.5.0",
         "optimist": "^0.6.1",
-        "source-map": "^0.4.4",
-        "uglify-js": "^2.6"
-      },
-      "dependencies": {
-        "uglify-js": {
-          "version": "2.8.29",
-          "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.8.29.tgz",
-          "integrity": "sha1-KcVzMUgFe7Th913zW3qcty5qWd0=",
-          "optional": true,
-          "requires": {
-            "source-map": "~0.5.1",
-            "uglify-to-browserify": "~1.0.0",
-            "yargs": "~3.10.0"
-          },
-          "dependencies": {
-            "source-map": {
-              "version": "0.5.7",
-              "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
-              "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
-              "optional": true
-            }
-          }
-        }
+        "source-map": "^0.6.1",
+        "uglify-js": "^3.1.4"
       }
     },
     "har-schema": {
@@ -4279,49 +4207,6 @@
         }
       }
     },
-    "hbs": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/hbs/-/hbs-4.0.1.tgz",
-      "integrity": "sha1-S/2YZQ3IydrESzyprfnAmOi8M7Y=",
-      "requires": {
-        "handlebars": "4.0.5",
-        "walk": "2.3.9"
-      },
-      "dependencies": {
-        "handlebars": {
-          "version": "4.0.5",
-          "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.0.5.tgz",
-          "integrity": "sha1-ksbta7FkEQxQ1NjQ+93HCAbG+Oc=",
-          "requires": {
-            "async": "^1.4.0",
-            "optimist": "^0.6.1",
-            "source-map": "^0.4.4",
-            "uglify-js": "^2.6"
-          },
-          "dependencies": {
-            "uglify-js": {
-              "version": "2.8.29",
-              "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.8.29.tgz",
-              "integrity": "sha1-KcVzMUgFe7Th913zW3qcty5qWd0=",
-              "optional": true,
-              "requires": {
-                "source-map": "~0.5.1",
-                "uglify-to-browserify": "~1.0.0",
-                "yargs": "~3.10.0"
-              },
-              "dependencies": {
-                "source-map": {
-                  "version": "0.5.7",
-                  "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
-                  "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
-                  "optional": true
-                }
-              }
-            }
-          }
-        }
-      }
-    },
     "helmet": {
       "version": "3.12.1",
       "resolved": "https://registry.npmjs.org/helmet/-/helmet-3.12.1.tgz",
@@ -6567,12 +6452,6 @@
         "package-json": "^4.0.0"
       }
     },
-    "lazy-cache": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/lazy-cache/-/lazy-cache-1.0.4.tgz",
-      "integrity": "sha1-odePw6UEdMuAhF07O24dpJpEbo4=",
-      "optional": true
-    },
     "lcid": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/lcid/-/lcid-1.0.0.tgz",
@@ -6710,11 +6589,6 @@
         "chalk": "^2.0.1"
       }
     },
-    "longest": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
-      "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc="
-    },
     "longest-streak": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/longest-streak/-/longest-streak-2.0.2.tgz",
@@ -9175,15 +9049,6 @@
       "resolved": "https://registry.npmjs.org/ret/-/ret-0.1.15.tgz",
       "integrity": "sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg=="
     },
-    "right-align": {
-      "version": "0.1.3",
-      "resolved": "https://registry.npmjs.org/right-align/-/right-align-0.1.3.tgz",
-      "integrity": "sha1-YTObci/mo1FWiSENJOFMlhSGE+8=",
-      "optional": true,
-      "requires": {
-        "align-text": "^0.1.1"
-      }
-    },
     "rimraf": {
       "version": "2.6.2",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.2.tgz",
@@ -9547,12 +9412,9 @@
       }
     },
     "source-map": {
-      "version": "0.4.4",
-      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
-      "integrity": "sha1-66T12pwNyZneaAMti092FzZSA2s=",
-      "requires": {
-        "amdefine": ">=0.0.4"
-      }
+      "version": "0.6.1",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+      "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
     },
     "source-map-resolve": {
       "version": "0.5.2",
@@ -10418,7 +10280,6 @@
       "version": "3.4.9",
       "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.4.9.tgz",
       "integrity": "sha512-8CJsbKOtEbnJsTyv6LE6m6ZKniqMiFWmm9sRbopbkGs3gMPPfd3Fh8iIA4Ykv5MgaTbqHr4BaoGLJLZNhsrW1Q==",
-      "dev": true,
       "requires": {
         "commander": "~2.17.1",
         "source-map": "~0.6.1"
@@ -10427,23 +10288,15 @@
         "commander": {
           "version": "2.17.1",
           "resolved": "https://registry.npmjs.org/commander/-/commander-2.17.1.tgz",
-          "integrity": "sha512-wPMUt6FnH2yzG95SA6mzjQOEKUU3aLaDEmzs1ti+1E9h+CsrZghRlqEM/EJ4KscsQVG8uNN4uVreUeT8+drlgg==",
-          "dev": true
+          "integrity": "sha512-wPMUt6FnH2yzG95SA6mzjQOEKUU3aLaDEmzs1ti+1E9h+CsrZghRlqEM/EJ4KscsQVG8uNN4uVreUeT8+drlgg=="
         },
         "source-map": {
           "version": "0.6.1",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
         }
       }
     },
-    "uglify-to-browserify": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz",
-      "integrity": "sha1-bgkk1r2mta/jSeOabWMoUKD4grc=",
-      "optional": true
-    },
     "uid-safe": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/uid-safe/-/uid-safe-2.1.4.tgz",
@@ -10807,14 +10660,6 @@
         "browser-process-hrtime": "^0.1.2"
       }
     },
-    "walk": {
-      "version": "2.3.9",
-      "resolved": "https://registry.npmjs.org/walk/-/walk-2.3.9.tgz",
-      "integrity": "sha1-MbTbZnjyrgHDnqn7hyWpAx5Vins=",
-      "requires": {
-        "foreachasync": "^3.0.0"
-      }
-    },
     "walker": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/walker/-/walker-1.0.7.tgz",
@@ -10900,12 +10745,6 @@
         "string-width": "^2.1.1"
       }
     },
-    "window-size": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.0.tgz",
-      "integrity": "sha1-VDjNLqk7IC76Ohn+iIeu58lPnJ0=",
-      "optional": true
-    },
     "wordwrap": {
       "version": "0.0.3",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
@@ -11031,18 +10870,6 @@
       "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
       "dev": true
     },
-    "yargs": {
-      "version": "3.10.0",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
-      "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
-      "optional": true,
-      "requires": {
-        "camelcase": "^1.0.2",
-        "cliui": "^2.1.0",
-        "decamelize": "^1.0.0",
-        "window-size": "0.1.0"
-      }
-    },
     "yargs-parser": {
       "version": "4.2.1",
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-4.2.1.tgz",
diff --git a/package.json b/package.json
index d60d9e9ce..58bdaed30 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,6 @@
     "full-icu": "^1.2.1",
     "git-rev-sync": "^1.12.0",
     "got": "^8.3.1",
-    "hbs": "^4.0.1",
     "helmet": "^3.12.1",
     "intl-pluralrules": "^0.2.1",
     "isemail": "^3.1.3",
diff --git a/server.js b/server.js
index 13dd1eda4..16565a3a8 100644
--- a/server.js
+++ b/server.js
@@ -125,13 +125,14 @@ app.use(express.static("public", {
     "public, maxage=" + 10 * 60 * 1000 + ", s-maxage=" + 24 * 60 * 60 * 1000),
 })); // 10-minute client-side caching; 24-hour server-side caching
 
-app.engine("hbs", exphbs({
+const hbs = exphbs.create({
   extname: ".hbs",
   layoutsDir: __dirname + "/views/layouts",
   defaultLayout: "default",
   partialsDir: __dirname + "/views/partials",
   helpers: HBSHelpers,
-}));
+});
+app.engine("hbs", hbs.engine);
 app.set("view engine", "hbs");
 
 const cookie = {httpOnly: true, sameSite: "lax"};