diff --git a/yarn.lock b/yarn.lock
index 66888de..c2193c8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -954,17 +954,10 @@ acorn-jsx@^4.1.1:
   dependencies:
     acorn "^5.0.3"
 
-acorn@^5.0.0:
-  version "5.1.2"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.1.2.tgz#911cb53e036807cf0fa778dc5d370fbd864246d7"
-
-acorn@^5.0.3, acorn@^5.6.0, acorn@^5.7.3:
-  version "5.7.3"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.3.tgz#67aa231bf8812974b85235a96771eb6bd07ea279"
-
-acorn@^5.1.2:
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.3.0.tgz#7446d39459c54fb49a80e6ee6478149b940ec822"
+acorn@^5.0.0, acorn@^5.0.3, acorn@^5.1.2, acorn@^5.6.0, acorn@^5.7.3:
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
 
 acorn@^6.0.5:
   version "6.1.0"
@@ -3238,7 +3231,7 @@ express@^4.16.2:
 
 express@^4.16.3:
   version "4.16.3"
-  resolved "http://registry.npmjs.org/express/-/express-4.16.3.tgz#6af8a502350db3246ecc4becf6b5a34d22f7ed53"
+  resolved "https://registry.npmjs.org/express/-/express-4.16.3.tgz#6af8a502350db3246ecc4becf6b5a34d22f7ed53"
   dependencies:
     accepts "~1.3.5"
     array-flatten "1.1.1"
@@ -3295,7 +3288,7 @@ extend@~3.0.2:
 
 external-editor@^2.1.0:
   version "2.2.0"
-  resolved "http://registry.npmjs.org/external-editor/-/external-editor-2.2.0.tgz#045511cfd8d133f3846673d1047c154e214ad3d5"
+  resolved "https://registry.npmjs.org/external-editor/-/external-editor-2.2.0.tgz#045511cfd8d133f3846673d1047c154e214ad3d5"
   dependencies:
     chardet "^0.4.0"
     iconv-lite "^0.4.17"
@@ -4289,7 +4282,7 @@ ini@^1.3.4, ini@~1.3.0:
 
 inquirer@^5.2.0:
   version "5.2.0"
-  resolved "http://registry.npmjs.org/inquirer/-/inquirer-5.2.0.tgz#db350c2b73daca77ff1243962e9f22f099685726"
+  resolved "https://registry.npmjs.org/inquirer/-/inquirer-5.2.0.tgz#db350c2b73daca77ff1243962e9f22f099685726"
   dependencies:
     ansi-escapes "^3.0.0"
     chalk "^2.0.0"
@@ -8626,7 +8619,7 @@ symbol-tree@^3.2.1:
 
 table@^4.0.3:
   version "4.0.3"
-  resolved "http://registry.npmjs.org/table/-/table-4.0.3.tgz#00b5e2b602f1794b9acaf9ca908a76386a7813bc"
+  resolved "https://registry.npmjs.org/table/-/table-4.0.3.tgz#00b5e2b602f1794b9acaf9ca908a76386a7813bc"
   dependencies:
     ajv "^6.0.1"
     ajv-keywords "^3.0.0"