diff --git a/fixtures/ember-cli/yarn.lock b/fixtures/ember-cli/yarn.lock
index 2bfbe4f..83bf9bd 100644
--- a/fixtures/ember-cli/yarn.lock
+++ b/fixtures/ember-cli/yarn.lock
@@ -1823,9 +1823,9 @@ etag@~1.7.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/etag/-/etag-1.7.0.tgz#03d30b5f67dd6e632d2945d30d6652731a34d5d8"
 
-eventemitter3@1.x.x:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-1.2.0.tgz#1c86991d816ad1e504750e73874224ecf3bec508"
+eventemitter3@^4.0.0:
+  version "4.0.7"
+  resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-4.0.7.tgz#2de9b68f6528d5644ef5c59526a1b4a07306169f"
 
 events-to-array@^1.0.1:
   version "1.0.2"
@@ -1984,6 +1984,10 @@ fireworm@^0.7.0:
     lodash.flatten "^3.0.2"
     minimatch "^3.0.2"
 
+follow-redirects@^1.0.0:
+  version "1.13.0"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.13.0.tgz#b42e8d93a2a7eea5ed88633676d6597bc8e384db"
+
 forever-agent@~0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/forever-agent/-/forever-agent-0.6.1.tgz#fbc71f0c41adeb37f96c577ad1ed42d8fdacca91"
@@ -2385,11 +2389,12 @@ http-errors@~1.5.0:
     statuses ">= 1.3.0 < 2"
 
 http-proxy@^1.13.1, http-proxy@^1.9.0:
-  version "1.15.1"
-  resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.15.1.tgz#91a6088172e79bc0e821d5eb04ce702f32446393"
+  version "1.18.1"
+  resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.18.1.tgz#401541f0534884bbf95260334e72f88ee3976549"
   dependencies:
-    eventemitter3 "1.x.x"
-    requires-port "1.x.x"
+    eventemitter3 "^4.0.0"
+    follow-redirects "^1.0.0"
+    requires-port "^1.0.0"
 
 http-signature@~1.1.0:
   version "1.1.1"
@@ -3923,7 +3928,7 @@ request@~2.72.0:
     tough-cookie "~2.2.0"
     tunnel-agent "~0.4.1"
 
-requires-port@1.x.x:
+requires-port@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/requires-port/-/requires-port-1.0.0.tgz#925d2601d39ac485e091cf0da5c6e694dc3dcaff"