diff --git a/compose/config/config_schema_v2.4.json b/compose/config/config_schema_v2.4.json
index 47e118755..4e6417887 100644
--- a/compose/config/config_schema_v2.4.json
+++ b/compose/config/config_schema_v2.4.json
@@ -346,6 +346,7 @@
       "dependencies": {
         "memswap_limit": ["mem_limit"]
       },
+      "patternProperties": {"^x-": {}},
       "additionalProperties": false
     },
 
@@ -409,6 +410,7 @@
         "labels": {"$ref": "#/definitions/labels"},
         "name": {"type": "string"}
       },
+      "patternProperties": {"^x-": {}},
       "additionalProperties": false
     },
 
@@ -451,6 +453,7 @@
         "labels": {"$ref": "#/definitions/labels"},
         "name": {"type": "string"}
       },
+      "patternProperties": {"^x-": {}},
       "additionalProperties": false
     },
 
diff --git a/compose/config/config_schema_v3.7.json b/compose/config/config_schema_v3.7.json
index 4c3d24dcd..05566cf81 100644
--- a/compose/config/config_schema_v3.7.json
+++ b/compose/config/config_schema_v3.7.json
@@ -319,6 +319,7 @@
         },
         "working_dir": {"type": "string"}
       },
+      "patternProperties": {"^x-": {}},
       "additionalProperties": false
     },
 
@@ -489,6 +490,7 @@
         "attachable": {"type": "boolean"},
         "labels": {"$ref": "#/definitions/list_or_dict"}
       },
+      "patternProperties": {"^x-": {}},
       "additionalProperties": false
     },
 
@@ -513,6 +515,7 @@
         },
         "labels": {"$ref": "#/definitions/list_or_dict"}
       },
+      "patternProperties": {"^x-": {}},
       "additionalProperties": false
     },
 
@@ -530,6 +533,7 @@
         },
         "labels": {"$ref": "#/definitions/list_or_dict"}
       },
+      "patternProperties": {"^x-": {}},
       "additionalProperties": false
     },
 
@@ -547,6 +551,7 @@
         },
         "labels": {"$ref": "#/definitions/list_or_dict"}
       },
+      "patternProperties": {"^x-": {}},
       "additionalProperties": false
     },