diff --git a/.travis.yml b/.travis.yml
index cdb06e55e..779850919 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,12 +6,18 @@ addons:
 
 jdk:
     - openjdk8
+    - openjdk11
+    
+matrix:
+  allow_failures:
+    - jdk: openjdk11
         
 script:
-    #- sonar-scanner
-    - mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent install sonar:sonar -Dsonar.projectKey=BentoBoxWorld_BentoBox
-    #- mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent package -P sonar sonar:sonar -B
-    #- echo "${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH}"
+    - mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent install
+    - export JAVA_HOME=$HOME/openjdk11
+    - $TRAVIS_BUILD_DIR/install-jdk.sh --install openjdk11 --target $JAVA_HOME
+    - mvn sonar:sonar -Dsonar.projectKey=BentoBoxWorld_BentoBox
+
 cache:
     directories:
         - '$HOME/.m2/repository'
diff --git a/src/main/java/world/bentobox/bentobox/listeners/flags/protection/BlockInteractionListener.java b/src/main/java/world/bentobox/bentobox/listeners/flags/protection/BlockInteractionListener.java
index cffabf04e..15c4dcbdc 100644
--- a/src/main/java/world/bentobox/bentobox/listeners/flags/protection/BlockInteractionListener.java
+++ b/src/main/java/world/bentobox/bentobox/listeners/flags/protection/BlockInteractionListener.java
@@ -1,5 +1,7 @@
 package world.bentobox.bentobox.listeners.flags.protection;
 
+import java.util.Collections;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
 
@@ -16,8 +18,6 @@ import org.bukkit.event.block.BlockBreakEvent;
 import org.bukkit.event.block.BlockFromToEvent;
 import org.bukkit.event.player.PlayerInteractEvent;
 
-import com.google.common.collect.ImmutableMap;
-
 import world.bentobox.bentobox.BentoBox;
 import world.bentobox.bentobox.api.flags.Flag;
 import world.bentobox.bentobox.api.flags.FlagListener;
@@ -34,8 +34,12 @@ public class BlockInteractionListener extends FlagListener {
      * These cover materials in another server version.
      * This avoids run time errors due to unknown enum values, at the expense of a string comparison
      */
-    private final Map<String, String> stringFlags = ImmutableMap.<String, String>builder()
-            .build();
+    private final static Map<String, String> stringFlags;
+    static {
+        Map<String, String> f = new HashMap<>();
+        f.put("RESPAWN_ANCHOR", "PLACE_BLOCKS");
+        stringFlags = Collections.unmodifiableMap(f);
+    }
 
     /**
      * Handle interaction with blocks