diff --git a/modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-retrofit2/infrastructure/ApiClient.kt.mustache b/modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-retrofit2/infrastructure/ApiClient.kt.mustache
index 52df6a87a623..a2a4a20ae73d 100644
--- a/modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-retrofit2/infrastructure/ApiClient.kt.mustache
+++ b/modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-retrofit2/infrastructure/ApiClient.kt.mustache
@@ -90,7 +90,7 @@ import okhttp3.MediaType.Companion.toMediaType
         kotlinxSerializationJson.asConverterFactory("application/json".toMediaType()),
         {{/kotlinx_serialization}}
         {{#jackson}}
-        JacksonConverterFactory.create(),
+        JacksonConverterFactory.create(serializerBuilder),
         {{/jackson}}
     )
 ) {
diff --git a/samples/client/petstore/kotlin-jvm-jackson/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt b/samples/client/petstore/kotlin-jvm-jackson/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
index 1a1b4fd85fa9..14a9210110a4 100644
--- a/samples/client/petstore/kotlin-jvm-jackson/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+++ b/samples/client/petstore/kotlin-jvm-jackson/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
@@ -28,7 +28,7 @@ class ApiClient(
     ),
     private val converterFactories: List<Converter.Factory> = listOf(
         ScalarsConverterFactory.create(),
-        JacksonConverterFactory.create(),
+        JacksonConverterFactory.create(serializerBuilder),
     )
 ) {
     private val apiAuthorizations = mutableMapOf<String, Interceptor>()
diff --git a/samples/client/petstore/kotlin-retrofit2-jackson/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt b/samples/client/petstore/kotlin-retrofit2-jackson/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
index 1a1b4fd85fa9..14a9210110a4 100644
--- a/samples/client/petstore/kotlin-retrofit2-jackson/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+++ b/samples/client/petstore/kotlin-retrofit2-jackson/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
@@ -28,7 +28,7 @@ class ApiClient(
     ),
     private val converterFactories: List<Converter.Factory> = listOf(
         ScalarsConverterFactory.create(),
-        JacksonConverterFactory.create(),
+        JacksonConverterFactory.create(serializerBuilder),
     )
 ) {
     private val apiAuthorizations = mutableMapOf<String, Interceptor>()