diff --git a/src/main/java/kafdrop/Kafdrop.java b/src/main/java/kafdrop/Kafdrop.java
index b94ace3a..d4a4bc75 100644
--- a/src/main/java/kafdrop/Kafdrop.java
+++ b/src/main/java/kafdrop/Kafdrop.java
@@ -147,21 +147,9 @@ public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) {
 
       LOG.info("Initializing JAAS config");
       final String env = environment.getProperty("kafka.env");
-      final boolean isSecured = environment.getProperty("kafka.isSecured", Boolean.class);
-      LOG.info("env: {} .isSecured kafka: {}", env, isSecured);
-      if (isSecured && Strings.isNullOrEmpty(env)) {
-        throw new IllegalArgumentException("Value of 'env' cannot be null if connecting to secured kafka.");
-      }
-
       LOG.info("Env: {}", env);
       String path;
 
-      if (isSecured) {
-        path = environment.getProperty("user.dir") + "/kaas_" + env.toLowerCase() + "_jaas.conf";
-        LOG.info("PATH: {}", path);
-        System.setProperty("java.security.auth.login.config", path);
-      }
-
       if (environment.containsProperty(SM_CONFIG_DIR)) {
         Stream.of("kafdrop", "global")
           .map(name -> readProperties(environment, name))
diff --git a/src/main/java/kafdrop/config/KafkaConfiguration.java b/src/main/java/kafdrop/config/KafkaConfiguration.java
index bb6e137e..e29bd815 100644
--- a/src/main/java/kafdrop/config/KafkaConfiguration.java
+++ b/src/main/java/kafdrop/config/KafkaConfiguration.java
@@ -22,7 +22,6 @@ public final class KafkaConfiguration {
   private static final Logger LOG = LoggerFactory.getLogger(KafkaConfiguration.class);
 
   private String brokerConnect;
-  private boolean isSecured = false;
   private String saslMechanism;
   private String securityProtocol;
   private String truststoreFile;
@@ -31,12 +30,8 @@ public final class KafkaConfiguration {
 
   public void applyCommon(Properties properties) {
     properties.setProperty(CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG, brokerConnect);
-    if (isSecured) {
-      LOG.warn("The 'isSecured' property is deprecated; consult README.md on the preferred way to configure security");
-      properties.put(SaslConfigs.SASL_MECHANISM, saslMechanism);
-    }
 
-    if (isSecured || securityProtocol.equals("SSL")) {
+    if (securityProtocol.equals("SSL")) {
       properties.put(CommonClientConfigs.SECURITY_PROTOCOL_CONFIG, securityProtocol);
     }
 
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index c7d3a4df..d80ad48d 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -38,7 +38,6 @@ kafdrop.monitor:
 
 kafka:
   brokerConnect: localhost:9092
-  isSecured: false
   saslMechanism: "PLAIN"
   securityProtocol: "SASL_PLAINTEXT"
   truststoreFile: "${KAFKA_TRUSTSTORE_FILE:kafka.truststore.jks}"