diff --git a/changelog/unreleased/37547 b/changelog/unreleased/37547
new file mode 100644
index 000000000000..d585fb18e8b2
--- /dev/null
+++ b/changelog/unreleased/37547
@@ -0,0 +1,3 @@
+Change: Update opis/closure (3.5.4 => 3.5.5)
+
+https://github.com/owncloud/core/pull/37547
diff --git a/composer.lock b/composer.lock
index 73239aefd375..d2d152a881b1 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1461,16 +1461,16 @@
         },
         {
             "name": "opis/closure",
-            "version": "3.5.4",
+            "version": "3.5.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/opis/closure.git",
-                "reference": "1d0deef692f66dae5d70663caee2867d0971306b"
+                "reference": "dec9fc5ecfca93f45cd6121f8e6f14457dff372c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/opis/closure/zipball/1d0deef692f66dae5d70663caee2867d0971306b",
-                "reference": "1d0deef692f66dae5d70663caee2867d0971306b",
+                "url": "https://api.github.com/repos/opis/closure/zipball/dec9fc5ecfca93f45cd6121f8e6f14457dff372c",
+                "reference": "dec9fc5ecfca93f45cd6121f8e6f14457dff372c",
                 "shasum": ""
             },
             "require": {
@@ -1518,7 +1518,7 @@
                 "serialization",
                 "serialize"
             ],
-            "time": "2020-06-07T11:41:29+00:00"
+            "time": "2020-06-17T14:59:55+00:00"
         },
         {
             "name": "patchwork/jsqueeze",