diff --git a/changelog/unreleased/37431 b/changelog/unreleased/37431
new file mode 100644
index 000000000000..273ea3c64b70
--- /dev/null
+++ b/changelog/unreleased/37431
@@ -0,0 +1,3 @@
+Change: Update opis/closure (3.5.1 => 3.5.2)
+
+https://github.com/owncloud/core/pull/37431
diff --git a/composer.lock b/composer.lock
index 1ad1aef68b78..b4b4447d19e3 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1461,16 +1461,16 @@
         },
         {
             "name": "opis/closure",
-            "version": "3.5.1",
+            "version": "3.5.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/opis/closure.git",
-                "reference": "93ebc5712cdad8d5f489b500c59d122df2e53969"
+                "reference": "2e3299cea6f485ca64d19c540f46d7896c512ace"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/opis/closure/zipball/93ebc5712cdad8d5f489b500c59d122df2e53969",
-                "reference": "93ebc5712cdad8d5f489b500c59d122df2e53969",
+                "url": "https://api.github.com/repos/opis/closure/zipball/2e3299cea6f485ca64d19c540f46d7896c512ace",
+                "reference": "2e3299cea6f485ca64d19c540f46d7896c512ace",
                 "shasum": ""
             },
             "require": {
@@ -1518,7 +1518,7 @@
                 "serialization",
                 "serialize"
             ],
-            "time": "2019-11-29T22:36:02+00:00"
+            "time": "2020-05-21T20:09:36+00:00"
         },
         {
             "name": "patchwork/jsqueeze",
@@ -4426,12 +4426,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/Roave/SecurityAdvisories.git",
-                "reference": "885e8b1e0bc2096989fd20938342e407e8045186"
+                "reference": "5ecaedea1061696e0dae9bbf75b0c3c7758cff44"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Roave/SecurityAdvisories/zipball/885e8b1e0bc2096989fd20938342e407e8045186",
-                "reference": "885e8b1e0bc2096989fd20938342e407e8045186",
+                "url": "https://api.github.com/repos/Roave/SecurityAdvisories/zipball/5ecaedea1061696e0dae9bbf75b0c3c7758cff44",
+                "reference": "5ecaedea1061696e0dae9bbf75b0c3c7758cff44",
                 "shasum": ""
             },
             "conflict": {
@@ -4472,7 +4472,7 @@
                 "doctrine/mongodb-odm": ">=1,<1.0.2",
                 "doctrine/mongodb-odm-bundle": ">=2,<3.0.1",
                 "doctrine/orm": ">=2,<2.4.8|>=2.5,<2.5.1",
-                "dolibarr/dolibarr": "<=10.0.6",
+                "dolibarr/dolibarr": "<11.0.4",
                 "dompdf/dompdf": ">=0.6,<0.6.2",
                 "drupal/core": ">=7,<7.69|>=8,<8.7.12|>=8.8,<8.8.4",
                 "drupal/drupal": ">=7,<7.69|>=8,<8.7.12|>=8.8,<8.8.4",
@@ -4688,7 +4688,7 @@
                 }
             ],
             "description": "Prevents installation of composer packages with known security vulnerabilities: no API, simply require it",
-            "time": "2020-05-16T00:00:31+00:00"
+            "time": "2020-05-22T00:01:32+00:00"
         },
         {
             "name": "sebastian/code-unit-reverse-lookup",