diff --git a/package.json b/package.json
index 524f87e9..19569f93 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "formidable": "^1.0.17",
     "gist-embed": "~2.6.0",
     "graceful-fs": "^4.1.11",
-    "handlebars": "^4.0.6",
+    "handlebars": "^4.3.0",
     "helmet": "^3.13.0",
     "highlight.js": "~9.12.0",
     "i18n": "^0.8.3",
diff --git a/yarn.lock b/yarn.lock
index bddcab02..59711103 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -400,11 +400,6 @@ ambi@^2.2.0:
     editions "^1.1.1"
     typechecker "^4.3.0"
 
-amdefine@>=0.0.4:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"
-  integrity sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=
-
 anchor-markdown-header@^0.5.5:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/anchor-markdown-header/-/anchor-markdown-header-0.5.7.tgz#045063d76e6a1f9cd327a57a0126aa0fdec371a7"
@@ -2265,6 +2260,11 @@ commander@~2.15.0:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
   integrity sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==
 
+commander@~2.20.3:
+  version "2.20.3"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
+  integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
+
 commondir@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
@@ -2304,7 +2304,7 @@ compressible@~2.0.13:
 
 compression@^1.6.2:
   version "1.7.2"
-  resolved "http://registry.npmjs.org/compression/-/compression-1.7.2.tgz#aaffbcd6aaf854b44ebb280353d5ad1651f59a69"
+  resolved "https://registry.npmjs.org/compression/-/compression-1.7.2.tgz#aaffbcd6aaf854b44ebb280353d5ad1651f59a69"
   integrity sha1-qv+81qr4VLROuygDU9WtFlH1mmk=
   dependencies:
     accepts "~1.3.4"
@@ -4731,16 +4731,16 @@ gzip-size@^1.0.0:
     browserify-zlib "^0.1.4"
     concat-stream "^1.4.1"
 
-handlebars@^4.0.6:
-  version "4.0.11"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.0.11.tgz#630a35dfe0294bc281edae6ffc5d329fc7982dcc"
-  integrity sha1-Ywo13+ApS8KB7a5v/F0yn8eYLcw=
+handlebars@^4.3.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.3.0.tgz#427391b584626c9c9c6ffb7d1fb90aa9789221cc"
+  integrity sha512-7XlnO8yBXOdi7AzowjZssQr47Ctidqm7GbgARapOaqSN9HQhlClnOkR9HieGauIT3A8MBC6u9wPCXs97PCYpWg==
   dependencies:
-    async "^1.4.0"
+    neo-async "^2.6.0"
     optimist "^0.6.1"
-    source-map "^0.4.4"
+    source-map "^0.6.1"
   optionalDependencies:
-    uglify-js "^2.6"
+    uglify-js "^3.1.4"
 
 har-schema@^1.0.5:
   version "1.0.5"
@@ -7186,10 +7186,10 @@ negotiator@0.6.1:
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
   integrity sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk=
 
-neo-async@^2.5.0:
-  version "2.5.2"
-  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.5.2.tgz#489105ce7bc54e709d736b195f82135048c50fcc"
-  integrity sha512-vdqTKI9GBIYcAEbFAcpKPErKINfPF5zIuz3/niBfq8WUZjpT2tytLlFVrBgWdOtqI4uaA/Rb6No0hux39XXDuw==
+neo-async@^2.5.0, neo-async@^2.6.0:
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.1.tgz#ac27ada66167fa8849a6addd837f6b189ad2081c"
+  integrity sha512-iyam8fBuCUpWeKPGpaNMetEocMt364qkCsfL9JuhjXX6dRnguRVOfk2GZaDpPjcOKiiXCPINZC1GczQ7iTq3Zw==
 
 next-tick@1:
   version "1.0.0"
@@ -7533,7 +7533,7 @@ once@~1.3.0:
 
 onetime@^1.0.0:
   version "1.1.0"
-  resolved "http://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
+  resolved "https://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
   integrity sha1-ofeDj4MUxRbwXs78vEzP4EtO14k=
 
 onetime@^2.0.0:
@@ -9853,13 +9853,6 @@ source-map@0.5.0:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.0.tgz#0fe96503ac86a5adb5de63f4e412ae4872cdbe86"
   integrity sha1-D+llA6yGpa213mP05BKuSHLNvoY=
 
-source-map@^0.4.4:
-  version "0.4.4"
-  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.4.4.tgz#eba4f5da9c0dc999de68032d8b4f76173652036b"
-  integrity sha1-66T12pwNyZneaAMti092FzZSA2s=
-  dependencies:
-    amdefine ">=0.0.4"
-
 source-map@^0.5.3, source-map@^0.5.6, source-map@^0.5.7, source-map@~0.5.1:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
@@ -10653,7 +10646,7 @@ uglify-js@3.4.x, uglify-js@^3.0.21:
     commander "~2.15.0"
     source-map "~0.6.1"
 
-uglify-js@^2.6, uglify-js@^2.8.15:
+uglify-js@^2.8.15:
   version "2.8.29"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.8.29.tgz#29c5733148057bb4e1f75df35b7a9cb72e6a59dd"
   integrity sha1-KcVzMUgFe7Th913zW3qcty5qWd0=
@@ -10663,6 +10656,14 @@ uglify-js@^2.6, uglify-js@^2.8.15:
   optionalDependencies:
     uglify-to-browserify "~1.0.0"
 
+uglify-js@^3.1.4:
+  version "3.7.3"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.7.3.tgz#f918fce9182f466d5140f24bb0ff35c2d32dcc6a"
+  integrity sha512-7tINm46/3puUA4hCkKYo4Xdts+JDaVC9ZPRcG8Xw9R4nhO/gZgUM3TENq8IF4Vatk8qCig4MzP/c8G4u2BkVQg==
+  dependencies:
+    commander "~2.20.3"
+    source-map "~0.6.1"
+
 uglify-js@~3.3.0:
   version "3.3.28"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.3.28.tgz#0efb9a13850e11303361c1051f64d2ec68d9be06"