diff --git a/src/main/java/io/sinistral/proteus/services/OpenAPIService.java b/src/main/java/io/sinistral/proteus/services/OpenAPIService.java
index a526dc6..b2c37ea 100644
--- a/src/main/java/io/sinistral/proteus/services/OpenAPIService.java
+++ b/src/main/java/io/sinistral/proteus/services/OpenAPIService.java
@@ -24,13 +24,9 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.fasterxml.jackson.annotation.JsonInclude.Include;
 import com.fasterxml.jackson.core.type.TypeReference;
-import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectWriter;
-import com.fasterxml.jackson.databind.SerializationFeature;
-import com.fasterxml.jackson.dataformat.yaml.YAMLMapper;
 import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
@@ -41,8 +37,8 @@
 import io.sinistral.proteus.server.tools.oas.Reader;
 import io.sinistral.proteus.server.tools.oas.ServerModelResolver;
 import io.sinistral.proteus.server.tools.oas.ServerParameterExtension;
-import io.swagger.util.Yaml;
 import io.swagger.v3.core.util.Json;
+import io.swagger.v3.core.util.Yaml;
 import io.swagger.v3.jaxrs2.ext.OpenAPIExtensions;
 import io.swagger.v3.jaxrs2.integration.JaxrsApplicationAndAnnotationScanner;
 import io.swagger.v3.oas.integration.GenericOpenApiContext;