diff --git a/composer.lock b/composer.lock
index b6c530855a8ca7118c9c5066ed86d497846a5690..4cdfa14331a655f6886f5c9f03975c34dcd8d8f7 100644
--- a/composer.lock
+++ b/composer.lock
@@ -653,7 +653,7 @@
             "dist": {
                 "type": "path",
                 "url": "core",
-                "reference": "5e617499e0c484e70f24bdf4334359cf37c95f9a"
+                "reference": "ed5e4d912f09f71ab245e49be98b409bc3c9ad1d"
             },
             "require": {
                 "asm89/stack-cors": "^1.1",
@@ -674,7 +674,7 @@
                 "ext-spl": "*",
                 "ext-tokenizer": "*",
                 "ext-xml": "*",
-                "guzzlehttp/guzzle": "^6.3",
+                "guzzlehttp/guzzle": "^6.5.2",
                 "masterminds/html5": "^2.1",
                 "pear/archive_tar": "^1.4.9",
                 "php": ">=7.2.3",
diff --git a/core/composer.json b/core/composer.json
index fbcdee3e6adf6f66349e88168b80226b6dd483b3..49c2df689a4c42747f41bb1caffd62f3f03b6cee 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -35,7 +35,7 @@
         "twig/twig": "^2.12.0",
         "doctrine/common": "^2.7",
         "doctrine/annotations": "^1.4",
-        "guzzlehttp/guzzle": "^6.3",
+        "guzzlehttp/guzzle": "^6.5.2",
         "symfony-cmf/routing": "^2.1",
         "zendframework/zend-feed": "^2.12",
         "stack/builder": "^1.0",