I'd like to add comments to an adapter JSON configuration file to help document my configuration. However, Keycloak throws an exception when trying to parse the file: 14:11:53,804 DEBUG [org.keycloak.adapters.jaas.BearerTokenLoginModule] (default task-15) Unable to find or parse file classpath:/keycloak.json due to com.fasterxml.jackson.core.JsonParseException: Unexpected character ('/' (code 47)): maybe a (non-standard) comment? (not recognized as one since Feature 'ALLOW_COMMENTS' not enabled for parser) at [Source: java.util.zip.ZipFile$ZipFileInflaterInputStream@3f9359f3; line: 1, column: 2]: java.lang.RuntimeException: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('/' (code 47)): maybe a (non-standard) comment? (not recognized as one since Feature 'ALLOW_COMMENTS' not enabled for parser) at [Source: java.util.zip.ZipFile$ZipFileInflaterInputStream@3f9359f3; line: 1, column: 2] at org.keycloak.adapters.KeycloakDeploymentBuilder.loadAdapterConfig(KeycloakDeploymentBuilder.java:162) at org.keycloak.adapters.KeycloakDeploymentBuilder.build(KeycloakDeploymentBuilder.java:151) at org.keycloak.adapters.jaas.AbstractKeycloakLoginModule.resolveDeployment(AbstractKeycloakLoginModule.java:103) at org.keycloak.adapters.jaas.AbstractKeycloakLoginModule.initialize(AbstractKeycloakLoginModule.java:83) Looking through the code, I see that the Keycloak JSON parser is created/defined as: org.keycloak.adapters.KeycloakDeploymentBuilder: public static AdapterConfig loadAdapterConfig(InputStream is) { ObjectMapper mapper = new ObjectMapper(new SystemPropertiesJsonParserFactory()); mapper.setSerializationInclusion(JsonInclude.Include.NON_DEFAULT); AdapterConfig adapterConfig; try { adapterConfig = mapper.readValue(is, AdapterConfig.class); } catch (IOException e) { throw new RuntimeException(e); } return adapterConfig; } Is there anyway I can configure the mapper to allow comments? ie: I'm looking to set: SystemPropertiesJsonParserFactory:enable(JsonParser.Feature. ALLOW_COMMENTS); But without DependencyInjection, I'm not sure how I can override the factory definition cleanly, without having to resort to some ugly hacks (ex: AspectJ, etc). I'm guessing there might be a way to define a custom KeycloakDeploymentBuilder, but I can't figure out how to configure that (if it even exists). Is there any chance to override/modify these settings? Thanks, Eric