diff --git a/build.gradle.kts b/build.gradle.kts
index d07e2e7..7ff0baf 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = "io.github.smiley4"
-version = "1.0.1"
+version = "1.0.2"
 
 repositories {
     mavenCentral()
diff --git a/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerUIPluginConfig.kt b/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerUIPluginConfig.kt
index ec7e041..d30a532 100644
--- a/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerUIPluginConfig.kt
+++ b/src/main/kotlin/io/github/smiley4/ktorswaggerui/SwaggerUIPluginConfig.kt
@@ -156,5 +156,6 @@ class SwaggerUIPluginConfig {
         .with(Option.INLINE_ALL_SCHEMAS)
         .with(Option.EXTRA_OPEN_API_FORMAT_VALUES)
         .with(Option.ALLOF_CLEANUP_AT_THE_END)
+        .with(Option.MAP_VALUES_AS_ADDITIONAL_PROPERTIES)
 
 }
diff --git a/src/main/kotlin/io/github/smiley4/ktorswaggerui/specbuilder/JsonToOpenApiSchemaConverter.kt b/src/main/kotlin/io/github/smiley4/ktorswaggerui/specbuilder/JsonToOpenApiSchemaConverter.kt
index aa30478..0d2dd47 100644
--- a/src/main/kotlin/io/github/smiley4/ktorswaggerui/specbuilder/JsonToOpenApiSchemaConverter.kt
+++ b/src/main/kotlin/io/github/smiley4/ktorswaggerui/specbuilder/JsonToOpenApiSchemaConverter.kt
@@ -13,8 +13,10 @@ class JsonToOpenApiSchemaConverter {
         return Schema<Any>().apply {
             node["\$schema"]?.let { this.`$schema` = it.asText() }
             node["type"]?.let { this.type = it.asText() }
+            node["format"]?.let { this.format = it.asText() }
             node["items"]?.let { this.items = toSchema(it) }
             node["properties"]?.let { this.properties = it.collectFields().associate { prop -> prop.key to toSchema(prop.value) } }
+            node["additionalProperties"]?.let { this.additionalProperties = toSchema(it) }
             node["allOf"]?.let { this.allOf = it.collectElements().map { prop -> toSchema(prop) } }
             node["anyOf"]?.let { this.anyOf = it.collectElements().map { prop -> toSchema(prop) } }
             node["required"]?.let { this.required = it.collectElements().map { prop -> prop.asText() } }
diff --git a/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/AssertionUtils.kt b/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/AssertionUtils.kt
index 9828a07..36fb281 100644
--- a/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/AssertionUtils.kt
+++ b/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/AssertionUtils.kt
@@ -269,7 +269,9 @@ infix fun Schema<*>.shouldBeSchema(expected: Schema<*>?) {
             this.properties[key]!! shouldBeSchema expected.properties[key]
         }
     }
-    this.additionalProperties shouldBe expected.additionalProperties
+    assertNullSafe(this.additionalProperties, expected.additionalProperties) {
+        (this.additionalProperties as Schema<Any>) shouldBeSchema  (expected.additionalProperties as Schema<Any>)
+    }
     this.description shouldBe expected.description
     this.`$ref` shouldBe expected.`$ref`
     this.nullable shouldBe expected.nullable
diff --git a/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/BuilderUtils.kt b/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/BuilderUtils.kt
index dd9e647..5e1b33f 100644
--- a/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/BuilderUtils.kt
+++ b/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/BuilderUtils.kt
@@ -1,6 +1,5 @@
 package io.github.smiley4.ktorswaggerui.tests
 
-import io.github.smiley4.ktorswaggerui.specbuilder.ApiSpecBuilder
 import io.github.smiley4.ktorswaggerui.specbuilder.OApiComponentsBuilder
 import io.github.smiley4.ktorswaggerui.specbuilder.OApiContentBuilder
 import io.github.smiley4.ktorswaggerui.specbuilder.OApiExampleBuilder
diff --git a/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/JsonSchemaGenerationTests.kt b/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/JsonSchemaGenerationTests.kt
index 74dede7..3ddc606 100644
--- a/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/JsonSchemaGenerationTests.kt
+++ b/src/test/kotlin/io/github/smiley4/ktorswaggerui/tests/JsonSchemaGenerationTests.kt
@@ -3,6 +3,7 @@ package io.github.smiley4.ktorswaggerui.tests
 import com.fasterxml.jackson.annotation.JsonSubTypes
 import com.fasterxml.jackson.annotation.JsonTypeInfo
 import com.fasterxml.jackson.core.type.TypeReference
+import com.github.victools.jsonschema.generator.SchemaGenerator
 import io.github.smiley4.ktorswaggerui.SwaggerUIPluginConfig
 import io.github.smiley4.ktorswaggerui.specbuilder.ComponentsContext
 import io.kotest.core.spec.style.StringSpec
@@ -17,6 +18,27 @@ class JsonSchemaGenerationTests : StringSpec({
         }
     }
 
+    "generate schema for maps" {
+        getOApiSchemaBuilder().build(DataClassWithMaps::class.java, ComponentsContext.NOOP, SwaggerUIPluginConfig()) shouldBeSchema {
+            type = "object"
+            properties = mapOf(
+                "mapStringValues" to Schema<Any>().apply {
+                    type = "object"
+                    additionalProperties = Schema<Any>().apply {
+                        type = "string"
+                    }
+                },
+                "mapLongValues" to Schema<Any>().apply {
+                    type = "object"
+                    additionalProperties = Schema<Any>().apply {
+                        type = "integer"
+                        format = "int64"
+                    }
+                },
+            )
+        }
+    }
+
     "generate schema for a list of simple classes" {
         getOApiSchemaBuilder().build(Array<SimpleDataClass>::class.java, ComponentsContext.NOOP, SwaggerUIPluginConfig()) shouldBeSchema {
             type = "array"
@@ -28,6 +50,7 @@ class JsonSchemaGenerationTests : StringSpec({
                     },
                     "value" to Schema<Any>().apply {
                         type = "number"
+                        format = "float"
                     }
                 )
             }
@@ -43,6 +66,7 @@ class JsonSchemaGenerationTests : StringSpec({
                 },
                 "value" to Schema<Any>().apply {
                     type = "number"
+                    format = "float"
                 }
             )
         }
@@ -54,11 +78,13 @@ class JsonSchemaGenerationTests : StringSpec({
             properties = mapOf(
                 "primitiveValue" to Schema<Any>().apply {
                     type = "integer"
+                    format = "int32"
                 },
                 "primitiveList" to Schema<Any>().apply {
                     type = "array"
                     items = Schema<Any>().apply {
                         type = "integer"
+                        format = "int32"
                     }
                 },
                 "nestedClass" to Schema<Any>().apply {
@@ -69,6 +95,7 @@ class JsonSchemaGenerationTests : StringSpec({
                         },
                         "value" to Schema<Any>().apply {
                             type = "number"
+                            format = "float"
                         }
                     )
                 },
@@ -82,6 +109,7 @@ class JsonSchemaGenerationTests : StringSpec({
                             },
                             "value" to Schema<Any>().apply {
                                 type = "number"
+                                format = "float"
                             }
                         )
                     }
@@ -99,6 +127,7 @@ class JsonSchemaGenerationTests : StringSpec({
                 },
                 "subFieldA" to Schema<Any>().apply {
                     type = "integer"
+                    format = "int32"
                 },
                 "_type" to Schema<Any>().apply {
                     setConst("io.github.smiley4.ktorswaggerui.tests.JsonSchemaGenerationTests\$Companion\$SubClassA")
@@ -119,6 +148,7 @@ class JsonSchemaGenerationTests : StringSpec({
                         },
                         "subFieldA" to Schema<Any>().apply {
                             type = "integer"
+                            format = "int32"
                         },
                         "_type" to Schema<Any>().apply {
                             setConst("io.github.smiley4.ktorswaggerui.tests.JsonSchemaGenerationTests\$Companion\$SubClassA")
@@ -187,6 +217,7 @@ class JsonSchemaGenerationTests : StringSpec({
                         },
                         "value" to Schema<Any>().apply {
                             type = "number"
+                            format = "float"
                         }
                     )
                 },
@@ -200,6 +231,7 @@ class JsonSchemaGenerationTests : StringSpec({
                             },
                             "value" to Schema<Any>().apply {
                                 type = "number"
+                                format = "float"
                             }
                         )
                     }
@@ -222,6 +254,11 @@ class JsonSchemaGenerationTests : StringSpec({
             val value: Float
         )
 
+        data class DataClassWithMaps(
+            val mapStringValues: Map<String, String>,
+            val mapLongValues: Map<String, Long>
+        )
+
         data class AnotherDataClass(
             val primitiveValue: Int,
             val primitiveList: List<Int>,