diff --git a/package.json b/package.json
index 02806d1..ec43449 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   },
   "dependencies": {
     "base-64": "^0.1.0",
-    "lodash": "^4.17.11",
+    "lodash": "^4.17.21",
     "markdown-it": "^8.4.2"
   },
   "repository": {
diff --git a/yarn.lock b/yarn.lock
index f2e4e67..dbb4ccb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -139,9 +139,9 @@ linkify-it@^2.0.0:
   dependencies:
     uc.micro "^1.0.1"
 
-lodash@^4.17.11:
-  version "4.17.11"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
+lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 markdown-it@^8.4.2:
   version "8.4.2"
@@ -165,7 +165,7 @@ minimatch@^3.0.4:
 
 minimist@~1.2.0:
   version "1.2.0"
-  resolved "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
+  resolved "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
 
 mock-require@^3.0.2:
   version "3.0.2"
@@ -250,7 +250,7 @@ tape@^4.9.1:
 
 through@~2.3.4, through@~2.3.8:
   version "2.3.8"
-  resolved "http://registry.npmjs.org/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
+  resolved "https://registry.npmjs.org/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
 
 uc.micro@^1.0.1, uc.micro@^1.0.5:
   version "1.0.5"