diff --git a/.travis.yml b/.travis.yml
index 761e4ee8..a3670e43 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,9 @@ language: java
 
 jdk:
   - oraclejdk8
+  - oraclejdk11
+  - openjdk10
+  - openjdk11
 
 env:
   matrix:
diff --git a/pom.xml b/pom.xml
index c3e6ad7a..2b2e070d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,11 +4,11 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>3.47</version>
+    <version>3.48</version>
   </parent>
 
   <properties>
-    <jenkins.version>2.138.1</jenkins.version>
+    <jenkins.version>2.164.3</jenkins.version>
 
     <java.level>8</java.level>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
diff --git a/src/main/java/jenkins/plugins/rocketchatnotifier/RocketChatNotifier.java b/src/main/java/jenkins/plugins/rocketchatnotifier/RocketChatNotifier.java
index 11964d98..5f13d1bd 100644
--- a/src/main/java/jenkins/plugins/rocketchatnotifier/RocketChatNotifier.java
+++ b/src/main/java/jenkins/plugins/rocketchatnotifier/RocketChatNotifier.java
@@ -30,10 +30,10 @@
 import org.kohsuke.stapler.QueryParameter;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.export.Exported;
-import sun.security.validator.ValidatorException;
 
 import javax.net.ssl.SSLHandshakeException;
 import java.io.IOException;
+import java.security.cert.CertificateException;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
@@ -542,6 +542,7 @@ public void setBuildServerUrl(String buildServerUrl) {
     public void setTrustSSL(boolean trustSSL) {
       this.trustSSL = trustSSL;
     }
+
     @DataBoundSetter
     public void setWebhookToken(String webhookToken) {
       this.webhookToken = webhookToken;
@@ -626,7 +627,7 @@ public FormValidation doTestConnection(@QueryParameter("rocketServerUrl") final
         return FormValidation.ok("Success");
       } catch (Exception e) {
         if (e.getCause() != null &&
-          e.getCause().getClass() == SSLHandshakeException.class || e.getCause().getClass() == ValidatorException.class) {
+          e.getCause().getClass() == SSLHandshakeException.class || e.getCause().getClass() == CertificateException.class) {
           LOGGER.log(Level.SEVERE, "SSL error during trying to send rocket message", e);
           return FormValidation.error(e, "SSL error", e);
         } else {
diff --git a/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClient.java b/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClient.java
index 688d3c7d..e73d6d6b 100644
--- a/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClient.java
+++ b/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClient.java
@@ -1,8 +1,8 @@
 package jenkins.plugins.rocketchatnotifier;
 
 import jenkins.plugins.rocketchatnotifier.rocket.errorhandling.RocketClientException;
-import sun.security.validator.ValidatorException;
 
+import java.security.cert.CertificateException;
 import java.util.List;
 import java.util.Map;
 
@@ -16,5 +16,5 @@ public interface RocketClient {
 
   boolean publish(String message, String emoji, String avatar, List<Map<String, Object>> attachments);
 
-  void validate() throws ValidatorException, RocketClientException;
+  void validate() throws CertificateException, RocketClientException;
 }
diff --git a/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClientImpl.java b/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClientImpl.java
index af1d2b02..a0d8410f 100644
--- a/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClientImpl.java
+++ b/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClientImpl.java
@@ -3,8 +3,8 @@
 import jenkins.plugins.rocketchatnotifier.rocket.RocketChatClient;
 import jenkins.plugins.rocketchatnotifier.rocket.RocketChatClientImpl;
 import jenkins.plugins.rocketchatnotifier.rocket.errorhandling.RocketClientException;
-import sun.security.validator.ValidatorException;
 
+import java.security.cert.CertificateException;
 import java.util.List;
 import java.util.Map;
 import java.util.logging.Level;
@@ -36,12 +36,10 @@ public boolean publish(String message, List<Map<String, Object>> attachments) {
       LOGGER.fine("Starting sending message to channel " + this.channel);
       this.client.send(this.channel, message, null, null, attachments);
       return true;
-    }
-    catch (RocketClientException e) {
+    } catch (RocketClientException e) {
       LOGGER.log(Level.SEVERE, "I/O error error during publishing message", e);
       return false;
-    }
-    catch (Exception e) {
+    } catch (Exception e) {
       LOGGER.log(Level.SEVERE, "Unknown error error during publishing message", e);
       return false;
     }
@@ -53,19 +51,17 @@ public boolean publish(final String message, final String emoji, final String av
       LOGGER.fine("Starting sending message to channel " + this.channel);
       this.client.send(this.channel, message, emoji, avatar, attachments);
       return true;
-    }
-    catch (RocketClientException e) {
+    } catch (RocketClientException e) {
       LOGGER.log(Level.SEVERE, "I/O error error during publishing message", e);
       return false;
-    }
-    catch (Exception e) {
+    } catch (Exception e) {
       LOGGER.log(Level.SEVERE, "Unknown error error during publishing message", e);
       return false;
     }
   }
 
   @Override
-  public void validate() throws ValidatorException, RocketClientException {
+  public void validate() throws CertificateException, RocketClientException {
     LOGGER.fine("Starting validating");
     this.client.getChannels();
   }
diff --git a/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClientWebhookImpl.java b/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClientWebhookImpl.java
index 209ecc93..c1ce7f65 100644
--- a/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClientWebhookImpl.java
+++ b/src/main/java/jenkins/plugins/rocketchatnotifier/RocketClientWebhookImpl.java
@@ -10,8 +10,8 @@
 import jenkins.plugins.rocketchatnotifier.rocket.errorhandling.RocketClientException;
 import org.apache.commons.lang.StringUtils;
 import org.jenkinsci.plugins.plaincredentials.StringCredentials;
-import sun.security.validator.ValidatorException;
 
+import java.security.cert.CertificateException;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
@@ -62,7 +62,7 @@ public boolean publish(final String message, final String emoji, final String av
   }
 
   @Override
-  public void validate() throws ValidatorException, RocketClientException {
+  public void validate() throws CertificateException, RocketClientException {
     this.client.send("", "Test message from Jenkins via Webhook");
   }
 
diff --git a/src/main/java/jenkins/plugins/rocketchatnotifier/rocket/RocketChatClient.java b/src/main/java/jenkins/plugins/rocketchatnotifier/rocket/RocketChatClient.java
index 20ac079e..3712130b 100644
--- a/src/main/java/jenkins/plugins/rocketchatnotifier/rocket/RocketChatClient.java
+++ b/src/main/java/jenkins/plugins/rocketchatnotifier/rocket/RocketChatClient.java
@@ -1,11 +1,10 @@
 package jenkins.plugins.rocketchatnotifier.rocket;
 
-import jenkins.plugins.rocketchatnotifier.model.Info;
 import jenkins.plugins.rocketchatnotifier.model.Room;
 import jenkins.plugins.rocketchatnotifier.model.User;
 import jenkins.plugins.rocketchatnotifier.rocket.errorhandling.RocketClientException;
-import sun.security.validator.ValidatorException;
 
+import java.security.cert.CertificateException;
 import java.util.List;
 import java.util.Map;
 
@@ -46,20 +45,20 @@ public interface RocketChatClient {
    *
    * @param room    to use (aka channel)
    * @param message to send
-   * @throws ValidatorException    in case of SSL errors
+   * @throws CertificateException    in case of SSL errors
    * @throws RocketClientException in case of communication errors with the RocketChat server backend
    */
-  void send(Room room, String message) throws ValidatorException, RocketClientException;
+  void send(Room room, String message) throws CertificateException, RocketClientException;
 
   /**
    * sends a message to a channel
    *
    * @param channelName to use
    * @param message     to send
-   * @throws ValidatorException    in case of SSL errors
+   * @throws CertificateException    in case of SSL errors
    * @throws RocketClientException in case of communication errors with the RocketChat server backend
    */
-  void send(String channelName, String message) throws ValidatorException, RocketClientException;
+  void send(String channelName, String message) throws CertificateException, RocketClientException;
 
   /**
    * sends a message to a channel.
@@ -69,10 +68,10 @@ public interface RocketChatClient {
    * @param message     to send
    * @param emoji       to display
    * @param avatar      to display
-   * @throws ValidatorException    in case of SSL errors
+   * @throws CertificateException    in case of SSL errors
    * @throws RocketClientException in case of communication errors with the RocketChat server backend
    */
-  void send(String channelName, String message, String emoji, String avatar) throws ValidatorException, RocketClientException;
+  void send(String channelName, String message, String emoji, String avatar) throws CertificateException, RocketClientException;
 
   /**
    * sends a message to a channel.
@@ -83,11 +82,11 @@ public interface RocketChatClient {
    * @param emoji       to display
    * @param avatar      to display
    * @param attachments to send
-   * @throws ValidatorException    in case of SSL errors
+   * @throws CertificateException    in case of SSL errors
    * @throws RocketClientException in case of communication errors with the RocketChat server backend
    */
   void send(String channelName, String message, String emoji, String avatar, List<Map<String, Object>> attachments)
-    throws ValidatorException, RocketClientException;
+    throws CertificateException, RocketClientException;
 
   /**
    * Retrieves server information
diff --git a/src/main/java/jenkins/plugins/rocketchatnotifier/rocket/RocketChatClientImpl.java b/src/main/java/jenkins/plugins/rocketchatnotifier/rocket/RocketChatClientImpl.java
index c7059549..6794304e 100644
--- a/src/main/java/jenkins/plugins/rocketchatnotifier/rocket/RocketChatClientImpl.java
+++ b/src/main/java/jenkins/plugins/rocketchatnotifier/rocket/RocketChatClientImpl.java
@@ -6,16 +6,15 @@
 import com.mashape.unirest.http.exceptions.UnirestException;
 import com.mashape.unirest.request.GetRequest;
 import jenkins.plugins.rocketchatnotifier.RocketClientImpl;
-import jenkins.plugins.rocketchatnotifier.model.Info;
 import jenkins.plugins.rocketchatnotifier.model.Response;
 import jenkins.plugins.rocketchatnotifier.model.Room;
 import jenkins.plugins.rocketchatnotifier.model.User;
 import jenkins.plugins.rocketchatnotifier.rocket.errorhandling.RocketClientException;
 import org.apache.commons.lang.StringUtils;
 import org.json.simple.JSONValue;
-import sun.security.validator.ValidatorException;
 
 import java.io.IOException;
+import java.security.cert.CertificateException;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -127,24 +126,24 @@ public String getInfo() throws RocketClientException {
   }
 
   @Override
-  public void send(Room room, String message) throws ValidatorException, RocketClientException {
+  public void send(Room room, String message) throws CertificateException, RocketClientException {
     this.send(room.getName(), message);
   }
 
   @Override
-  public void send(String channelName, String message) throws ValidatorException, RocketClientException {
+  public void send(String channelName, String message) throws CertificateException, RocketClientException {
     this.send(channelName, message, null, null);
   }
 
   @Override
   public void send(final String channelName, final String message, final String emoji, final String avatar)
-    throws ValidatorException, RocketClientException {
+    throws CertificateException, RocketClientException {
     this.send(channelName, message, emoji, avatar, null);
   }
 
   @Override
   public void send(final String channelName, final String message, final String emoji, final String avatar, final List<Map<String, Object>> attachments)
-    throws ValidatorException, RocketClientException {
+    throws CertificateException, RocketClientException {
     if (!channelName.contains(",")) {
       sendSingleMessage(channelName, message, emoji, avatar, attachments);
       return;