diff --git a/yarn.lock b/yarn.lock
index ae6afa4..1327035 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -816,7 +816,7 @@ combined-stream@1.0.6, combined-stream@^1.0.5, combined-stream@~1.0.5, combined-
 
 commander@2.15.1:
   version "2.15.1"
-  resolved "http://registry.npmjs.org/commander/-/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
+  resolved "https://registry.npmjs.org/commander/-/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
   integrity sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==
 
 commander@^2.6.0, commander@^2.9.0:
@@ -952,7 +952,7 @@ debug@2.6.9, debug@^2.6.8, debug@^2.6.9:
   dependencies:
     ms "2.0.0"
 
-debug@3.1.0, debug@^3.1.0, debug@~3.1.0:
+debug@3.1.0, debug@~3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
   integrity sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==
@@ -1239,11 +1239,9 @@ fireworm@^0.7.0:
     minimatch "^3.0.2"
 
 follow-redirects@^1.0.0:
-  version "1.5.1"
-  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.5.1.tgz#67a8f14f5a1f67f962c2c46469c79eaec0a90291"
-  integrity sha512-v9GI1hpaqq1ZZR6pBD1+kI7O24PhDvNGNodjS3MdcEqyrahCp8zbtpv+2B/krUnSmUH80lbAS7MrdeK5IylgKg==
-  dependencies:
-    debug "^3.1.0"
+  version "1.15.1"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.15.1.tgz#0ca6a452306c9b276e4d3127483e29575e207ad5"
+  integrity sha512-yLAMQs+k0b2m7cVxpS1VKJVvoz7SS9Td1zss3XRwXj+ZDH00RJgnuLx7E44wx02kQLrdM3aOOy+FpzS7+8OizA==
 
 forever-agent@~0.6.1:
   version "0.6.1"
@@ -2809,7 +2807,7 @@ sinon-chai@^3.0:
 
 sinon@^4.4.9:
   version "4.5.0"
-  resolved "http://registry.npmjs.org/sinon/-/sinon-4.5.0.tgz#427ae312a337d3c516804ce2754e8c0d5028cb04"
+  resolved "https://registry.npmjs.org/sinon/-/sinon-4.5.0.tgz#427ae312a337d3c516804ce2754e8c0d5028cb04"
   integrity sha512-trdx+mB0VBBgoYucy6a9L7/jfQOmvGeaKZT4OOJ+lPAtI8623xyGr8wLiE4eojzBS8G9yXbhx42GHUOVLr4X2w==
   dependencies:
     "@sinonjs/formatio" "^2.0.0"