diff --git a/package.json b/package.json
index aa47ef16..f6674921 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "semantic-release": "15.14.0",
     "@semantic-release/changelog": "3.0.6",
     "@semantic-release/git": "7.0.18",
-    "@semantic-release/github": "5.5.5",
+    "@semantic-release/github": "5.5.8",
     "@semantic-release/npm": "5.3.5",
     "any-shell-escape": "0.1.1",
     "browserify": "16.5.0",
diff --git a/yarn.lock b/yarn.lock
index 1e810239..38f62a3e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -259,9 +259,9 @@
     micromatch "^4.0.0"
     p-reduce "^2.0.0"
 
-"@semantic-release/github@5.5.5":
-  version "5.5.5"
-  resolved "https://registry.yarnpkg.com/@semantic-release/github/-/github-5.5.5.tgz#4666367f16d8ad91fd1d3c71a7238498de14ec38"
+"@semantic-release/github@5.5.8":
+  version "5.5.8"
+  resolved "https://registry.yarnpkg.com/@semantic-release/github/-/github-5.5.8.tgz#2c16d212ca057ba0b0553b6eb62ff0949cfbca6a"
   dependencies:
     "@octokit/rest" "^16.27.0"
     "@semantic-release/error" "^2.2.0"
@@ -271,8 +271,8 @@
     dir-glob "^3.0.0"
     fs-extra "^8.0.0"
     globby "^10.0.0"
-    http-proxy-agent "^2.1.0"
-    https-proxy-agent "^3.0.0"
+    http-proxy-agent "^3.0.0"
+    https-proxy-agent "^4.0.0"
     issue-parser "^5.0.0"
     lodash "^4.17.4"
     mime "^2.4.3"
@@ -434,11 +434,9 @@ agent-base@4, agent-base@^4.1.0, agent-base@~4.2.1:
   dependencies:
     es6-promisify "^5.0.0"
 
-agent-base@^4.3.0:
-  version "4.3.0"
-  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.3.0.tgz#8165f01c436009bccad0b1d122f05ed770efc6ee"
-  dependencies:
-    es6-promisify "^5.0.0"
+agent-base@5:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-5.1.1.tgz#e8fb3f242959db44d63be665db7a8e739537a32c"
 
 agentkeepalive@^3.4.1:
   version "3.5.2"
@@ -1750,18 +1748,18 @@ debug@3.2.6:
   dependencies:
     ms "^2.1.1"
 
+debug@4, debug@^4.0.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
+  dependencies:
+    ms "^2.1.1"
+
 debug@^2.2.0, debug@^2.3.3, debug@^2.6.8, debug@^2.6.9:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
   dependencies:
     ms "2.0.0"
 
-debug@^4.0.0:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
-  dependencies:
-    ms "^2.1.1"
-
 debuglog@*, debuglog@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/debuglog/-/debuglog-1.0.1.tgz#aa24ffb9ac3df9a2351837cfb2d279360cd78492"
@@ -3302,6 +3300,13 @@ http-proxy-agent@^2.1.0:
     agent-base "4"
     debug "3.1.0"
 
+http-proxy-agent@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/http-proxy-agent/-/http-proxy-agent-3.0.0.tgz#598f42dc815949a11e2c6dbfdf24cd8a4c165327"
+  dependencies:
+    agent-base "5"
+    debug "4"
+
 http-signature@~1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/http-signature/-/http-signature-1.2.0.tgz#9aecd925114772f3d95b65a60abb8f7c18fbace1"
@@ -3321,12 +3326,12 @@ https-proxy-agent@^2.2.0, https-proxy-agent@^2.2.1:
     agent-base "^4.1.0"
     debug "^3.1.0"
 
-https-proxy-agent@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-3.0.0.tgz#0106efa5d63d6d6f3ab87c999fa4877a3fd1ff97"
+https-proxy-agent@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-4.0.0.tgz#702b71fb5520a132a66de1f67541d9e62154d82b"
   dependencies:
-    agent-base "^4.3.0"
-    debug "^3.1.0"
+    agent-base "5"
+    debug "4"
 
 human-signals@^1.1.1:
   version "1.1.1"