diff --git a/restdocs-api-spec-generator/src/main/kotlin/com/keecon/restdocs/apispec/generator/OpenApi3Generator.kt b/restdocs-api-spec-generator/src/main/kotlin/com/keecon/restdocs/apispec/generator/OpenApi3Generator.kt
index 9caeef8..c1fada8 100644
--- a/restdocs-api-spec-generator/src/main/kotlin/com/keecon/restdocs/apispec/generator/OpenApi3Generator.kt
+++ b/restdocs-api-spec-generator/src/main/kotlin/com/keecon/restdocs/apispec/generator/OpenApi3Generator.kt
@@ -38,6 +38,7 @@ import io.swagger.v3.oas.models.media.Content
 import io.swagger.v3.oas.models.media.IntegerSchema
 import io.swagger.v3.oas.models.media.MediaType
 import io.swagger.v3.oas.models.media.NumberSchema
+import io.swagger.v3.oas.models.media.ObjectSchema
 import io.swagger.v3.oas.models.media.Schema
 import io.swagger.v3.oas.models.media.StringSchema
 import io.swagger.v3.oas.models.parameters.HeaderParameter
@@ -532,6 +533,10 @@ object OpenApi3Generator {
                 applyConstraints(descriptor)
             }
 
+            DataType.OBJECT.lowercase() -> ObjectSchema().apply {
+                applyProperties(descriptor)
+            }
+
             else -> throw IllegalArgumentException("Unknown type '${descriptor.type}'")
         }
     }