diff --git a/.travis.yml b/.travis.yml
index 30610bb..d249332 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,7 @@ php:
 sudo: false
 
 before_install:
-  - composer update
+  - COMPOSER_MEMORY_LIMIT=-1 composer update
 
 script: |
   if [[ $TRAVIS_PHP_VERSION = 7.* ]]; then
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 033d1f1..dd18716 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+### 1.5.5 (2019-02-27)
+
+  * Compatibility with Symfony 4.1
+  * Fixed preflight responses to always include `Origin` in the `Vary` HTTP header
+
 ### 1.5.4 (2017-12-11)
 
   * Compatibility with Symfony 4