diff --git a/modules/openapi-generator/src/main/resources/Java/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/build.gradle.mustache
index c65fb3cea28..9e1142970ee 100644
--- a/modules/openapi-generator/src/main/resources/Java/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/build.gradle.mustache
@@ -138,6 +138,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "{{^threetenbp}}2.9.9{{/threetenbp}}{{#threetenbp}}2.6.4{{/threetenbp}}"
     jackson_databind_version = "{{^threetenbp}}2.9.9{{/threetenbp}}{{#threetenbp}}2.6.4{{/threetenbp}}"
+    jackson-databind-nullable-version = "0.2.0"
     jersey_version = "1.19.4"
     jodatime_version = "2.9.9"
     junit_version = "4.12"
@@ -152,6 +153,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:$jackson_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     {{#joda}}
     compile "com.fasterxml.jackson.datatype:jackson-datatype-joda:$jackson_version"
     {{/joda}}
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/feign/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/feign/build.gradle.mustache
index 982faaa4628..febdd5d11bf 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/feign/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/feign/build.gradle.mustache
@@ -122,6 +122,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     {{#threetenbp}}
     threepane_version = "2.6.4"
     {{/threetenbp}}
@@ -141,6 +142,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     {{#joda}}
     compile "com.fasterxml.jackson.datatype:jackson-datatype-joda:$jackson_version"
     {{/joda}}
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/build.gradle.mustache
index 84ae616aad6..f01cd1fc70f 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/build.gradle.mustache
@@ -122,6 +122,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     google_api_client_version = "1.23.0"
     jersey_common_version = "2.25.1"
     jodatime_version = "2.9.9"
@@ -140,6 +141,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:$jackson_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     {{#java8}}
     compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jackson_version"
     {{/java8}}
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/build.gradle.mustache
index 3f192edafd8..fdda0dc7ede 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/build.gradle.mustache
@@ -121,6 +121,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     {{#supportJava6}}
     jersey_version = "2.6"
     commons_io_version=2.5
@@ -144,6 +145,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     {{#joda}}
     compile "com.fasterxml.jackson.datatype:jackson-datatype-joda:$jackson_version"
     {{/joda}}
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/build.gradle.mustache
index 4232b110be4..47b5e19323a 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/build.gradle.mustache
@@ -121,6 +121,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     threetenbp_version = "2.6.4"
     resteasy_version = "3.1.3.Final"
     {{^java8}}
@@ -143,6 +144,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.github.joschi.jackson:jackson-datatype-threetenbp:$threetenbp_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     {{#java8}}
     compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jackson_version"
     {{/java8}}
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/build.gradle.mustache
index a3a9716286a..e3cd4fa751e 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/build.gradle.mustache
@@ -122,6 +122,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     spring_web_version = "4.3.9.RELEASE"
     jodatime_version = "2.9.9"
     junit_version = "4.12"
@@ -138,6 +139,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:$jackson_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     {{#java8}}
     compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jackson_version"
     {{/java8}}
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache
index 41ba4811340..0d4d1ad995e 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache
@@ -133,6 +133,7 @@ ext {
     {{#play26}}
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     play_version = "2.6.7"
     {{/play26}}
     {{/usePlayWS}}
@@ -189,6 +190,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.fasterxml.jackson.datatype:jackson-datatype-{{^java8}}joda{{/java8}}{{#java8}}jsr310{{/java8}}:$jackson_version"
     {{/usePlayWS}}
 
diff --git a/samples/client/petstore/java/feign/build.gradle b/samples/client/petstore/java/feign/build.gradle
index f05dc55cd7a..bd54806dd0e 100644
--- a/samples/client/petstore/java/feign/build.gradle
+++ b/samples/client/petstore/java/feign/build.gradle
@@ -98,6 +98,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     threepane_version = "2.6.4"
     feign_version = "9.7.0"
     feign_form_version = "2.1.0"
@@ -115,6 +116,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.github.joschi.jackson:jackson-datatype-threetenbp:$threepane_version"
     compile "org.apache.oltu.oauth2:org.apache.oltu.oauth2.client:$oltu_version"
     compile "com.brsanthu:migbase64:2.2"
diff --git a/samples/client/petstore/java/feign10x/build.gradle b/samples/client/petstore/java/feign10x/build.gradle
index 39c27469054..7c9b95378fd 100644
--- a/samples/client/petstore/java/feign10x/build.gradle
+++ b/samples/client/petstore/java/feign10x/build.gradle
@@ -98,6 +98,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     threepane_version = "2.6.4"
     feign_version = "10.2.3"
     feign_form_version = "2.1.0"
@@ -115,6 +116,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.github.joschi.jackson:jackson-datatype-threetenbp:$threepane_version"
     compile "org.apache.oltu.oauth2:org.apache.oltu.oauth2.client:$oltu_version"
     compile "com.brsanthu:migbase64:2.2"
diff --git a/samples/client/petstore/java/google-api-client/build.gradle b/samples/client/petstore/java/google-api-client/build.gradle
index ea26f687525..4f532e81f62 100644
--- a/samples/client/petstore/java/google-api-client/build.gradle
+++ b/samples/client/petstore/java/google-api-client/build.gradle
@@ -98,6 +98,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     google_api_client_version = "1.23.0"
     jersey_common_version = "2.25.1"
     jodatime_version = "2.9.9"
@@ -114,6 +115,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:$jackson_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.github.joschi.jackson:jackson-datatype-threetenbp:$jackson_threeten_version"
     testCompile "junit:junit:$junit_version"
 }
diff --git a/samples/client/petstore/java/jersey1/build.gradle b/samples/client/petstore/java/jersey1/build.gradle
index 111b509b380..d372e039887 100644
--- a/samples/client/petstore/java/jersey1/build.gradle
+++ b/samples/client/petstore/java/jersey1/build.gradle
@@ -114,6 +114,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.6.4"
     jackson_databind_version = "2.6.4"
+    jackson-databind-nullable-version = "0.2.0"
     jersey_version = "1.19.4"
     jodatime_version = "2.9.9"
     junit_version = "4.12"
@@ -128,6 +129,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:$jackson_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.github.joschi.jackson:jackson-datatype-threetenbp:$jackson_version"
     compile "com.brsanthu:migbase64:2.2"
     testCompile "junit:junit:$junit_version"
diff --git a/samples/client/petstore/java/jersey2-java8/build.gradle b/samples/client/petstore/java/jersey2-java8/build.gradle
index b3382a0779e..44284eee822 100644
--- a/samples/client/petstore/java/jersey2-java8/build.gradle
+++ b/samples/client/petstore/java/jersey2-java8/build.gradle
@@ -97,6 +97,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     jersey_version = "2.27"
     junit_version = "4.12"
 }
@@ -110,6 +111,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jackson_version"
     testCompile "junit:junit:$junit_version"
 }
diff --git a/samples/client/petstore/java/jersey2/build.gradle b/samples/client/petstore/java/jersey2/build.gradle
index 0c9c756cdcc..b848f946e5e 100644
--- a/samples/client/petstore/java/jersey2/build.gradle
+++ b/samples/client/petstore/java/jersey2/build.gradle
@@ -97,6 +97,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     jersey_version = "2.27"
     junit_version = "4.12"
     threetenbp_version = "2.6.4"
@@ -111,6 +112,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.github.joschi.jackson:jackson-datatype-threetenbp:$threetenbp_version"
     compile "com.brsanthu:migbase64:2.2"
     testCompile "junit:junit:$junit_version"
diff --git a/samples/client/petstore/java/resteasy/build.gradle b/samples/client/petstore/java/resteasy/build.gradle
index eddbfd1e843..7b20123a77a 100644
--- a/samples/client/petstore/java/resteasy/build.gradle
+++ b/samples/client/petstore/java/resteasy/build.gradle
@@ -97,6 +97,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     threetenbp_version = "2.6.4"
     resteasy_version = "3.1.3.Final"
     jodatime_version = "2.9.9"
@@ -113,6 +114,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.github.joschi.jackson:jackson-datatype-threetenbp:$threetenbp_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.fasterxml.jackson.datatype:jackson-datatype-joda:$jackson_version"
     compile "joda-time:joda-time:$jodatime_version"
     compile "com.brsanthu:migbase64:2.2"
diff --git a/samples/client/petstore/java/resttemplate-withXml/build.gradle b/samples/client/petstore/java/resttemplate-withXml/build.gradle
index c72c59f98a0..c9ea3c3ea7e 100644
--- a/samples/client/petstore/java/resttemplate-withXml/build.gradle
+++ b/samples/client/petstore/java/resttemplate-withXml/build.gradle
@@ -98,6 +98,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     spring_web_version = "4.3.9.RELEASE"
     jodatime_version = "2.9.9"
     junit_version = "4.12"
@@ -112,6 +113,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:$jackson_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.github.joschi.jackson:jackson-datatype-threetenbp:$jackson_threeten_version"
     compile "com.fasterxml.jackson.dataformat:jackson-dataformat-xml:$jackson_version"
     testCompile "junit:junit:$junit_version"
diff --git a/samples/client/petstore/java/resttemplate/build.gradle b/samples/client/petstore/java/resttemplate/build.gradle
index 9aa0a46fccf..4b2417df938 100644
--- a/samples/client/petstore/java/resttemplate/build.gradle
+++ b/samples/client/petstore/java/resttemplate/build.gradle
@@ -98,6 +98,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     spring_web_version = "4.3.9.RELEASE"
     jodatime_version = "2.9.9"
     junit_version = "4.12"
@@ -112,6 +113,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:$jackson_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.github.joschi.jackson:jackson-datatype-threetenbp:$jackson_threeten_version"
     testCompile "junit:junit:$junit_version"
 }
diff --git a/samples/client/petstore/java/retrofit2-play24/build.gradle b/samples/client/petstore/java/retrofit2-play24/build.gradle
index 1766fa5b3a7..663a8a3475c 100644
--- a/samples/client/petstore/java/retrofit2-play24/build.gradle
+++ b/samples/client/petstore/java/retrofit2-play24/build.gradle
@@ -119,6 +119,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jackson_version"
 
     testCompile "junit:junit:$junit_version"
diff --git a/samples/client/petstore/java/retrofit2-play25/build.gradle b/samples/client/petstore/java/retrofit2-play25/build.gradle
index 1c6b07aa86d..7fbd367c8d3 100644
--- a/samples/client/petstore/java/retrofit2-play25/build.gradle
+++ b/samples/client/petstore/java/retrofit2-play25/build.gradle
@@ -121,6 +121,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jackson_version"
 
     testCompile "junit:junit:$junit_version"
diff --git a/samples/client/petstore/java/retrofit2-play26/build.gradle b/samples/client/petstore/java/retrofit2-play26/build.gradle
index f8182e09329..8a38e09d7f5 100644
--- a/samples/client/petstore/java/retrofit2-play26/build.gradle
+++ b/samples/client/petstore/java/retrofit2-play26/build.gradle
@@ -99,6 +99,7 @@ ext {
     retrofit_version = "2.3.0"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     play_version = "2.6.7"
     swagger_annotations_version = "1.5.22"
     junit_version = "4.12"
@@ -123,6 +124,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jackson_version"
 
     testCompile "junit:junit:$junit_version"
diff --git a/samples/client/petstore/java/webclient/build.gradle b/samples/client/petstore/java/webclient/build.gradle
index 70ecf2cc3aa..2b51c08597c 100644
--- a/samples/client/petstore/java/webclient/build.gradle
+++ b/samples/client/petstore/java/webclient/build.gradle
@@ -114,6 +114,7 @@ ext {
     swagger_annotations_version = "1.5.22"
     jackson_version = "2.9.9"
     jackson_databind_version = "2.9.9"
+    jackson-databind-nullable-version = "0.2.0"
     jersey_version = "1.19.4"
     jodatime_version = "2.9.9"
     junit_version = "4.12"
@@ -128,6 +129,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:$jackson_version"
+    compile "org.openapitools:jackson-databind-nullable:$jackson-databind-nullable-version"
     compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jackson_version"
     testCompile "junit:junit:$junit_version"
 }