diff --git a/material-intro-screen/src/main/java/agency/tango/materialintroscreen/fragments/SlideFragmentBase.java b/material-intro-screen/src/main/java/agency/tango/materialintroscreen/fragments/SlideFragmentBase.java
index d770c54..f537bdf 100644
--- a/material-intro-screen/src/main/java/agency/tango/materialintroscreen/fragments/SlideFragmentBase.java
+++ b/material-intro-screen/src/main/java/agency/tango/materialintroscreen/fragments/SlideFragmentBase.java
@@ -1,9 +1,11 @@
 package agency.tango.materialintroscreen.fragments;
 
 import android.content.pm.PackageManager;
+import android.os.Build;
 import android.support.annotation.ColorRes;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.content.ContextCompat;
+import android.text.TextUtils;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -43,6 +45,10 @@ public String[] neededPermissions() {
     }
 
     public boolean hasAnyPermissionsToGrant() {
+        if (!isAndroidVersionSupportingPermissions()) {
+            return false;
+        }
+
         boolean hasPermissionToGrant = hasPermissionsToGrant(neededPermissions());
         if (!hasPermissionToGrant) {
             hasPermissionToGrant = hasPermissionsToGrant(possiblePermissions());
@@ -60,7 +66,7 @@ public void askForPermissions() {
 
         if (neededPermissions() != null) {
             for (String permission : neededPermissions()) {
-                if (isNotNullOrEmpty(permission)) {
+                if (!TextUtils.isEmpty(permission)) {
                     if (ContextCompat.checkSelfPermission(getContext(), permission)
                             != PackageManager.PERMISSION_GRANTED) {
                         notGrantedPermissions.add(permission);
@@ -70,7 +76,7 @@ public void askForPermissions() {
         }
         if (possiblePermissions() != null) {
             for (String permission : possiblePermissions()) {
-                if (isNotNullOrEmpty(permission)) {
+                if (!TextUtils.isEmpty(permission)) {
                     if (ContextCompat.checkSelfPermission(getContext(), permission)
                             != PackageManager.PERMISSION_GRANTED) {
                         notGrantedPermissions.add(permission);
@@ -86,9 +92,13 @@ public void askForPermissions() {
 
     @SuppressWarnings({"PMD.CollapsibleIfStatements"})
     private boolean hasPermissionsToGrant(String[] permissions) {
+        if (!isAndroidVersionSupportingPermissions()) {
+            return false;
+        }
+
         if (permissions != null) {
             for (String permission : permissions) {
-                if (isNotNullOrEmpty(permission)) {
+                if (!TextUtils.isEmpty(permission)) {
                     if (ContextCompat.checkSelfPermission(getContext(), permission)
                             != PackageManager.PERMISSION_GRANTED) {
                         return true;
@@ -106,7 +116,7 @@ private String[] removeEmptyAndNullStrings(final ArrayList<String> permissions)
         return list.toArray(new String[list.size()]);
     }
 
-    public static boolean isNotNullOrEmpty(String string) {
-        return string != null && !string.isEmpty();
+    private boolean isAndroidVersionSupportingPermissions() {
+        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
     }
 }
\ No newline at end of file
diff --git a/material-intro-screen/src/main/java/agency/tango/materialintroscreen/listeners/MessageButtonBehaviourOnPageSelected.java b/material-intro-screen/src/main/java/agency/tango/materialintroscreen/listeners/MessageButtonBehaviourOnPageSelected.java
index 9402b49..1e3ebdf 100644
--- a/material-intro-screen/src/main/java/agency/tango/materialintroscreen/listeners/MessageButtonBehaviourOnPageSelected.java
+++ b/material-intro-screen/src/main/java/agency/tango/materialintroscreen/listeners/MessageButtonBehaviourOnPageSelected.java
@@ -1,17 +1,16 @@
 package agency.tango.materialintroscreen.listeners;
 
+import android.text.TextUtils;
 import android.util.SparseArray;
 import android.view.View;
 import android.view.animation.AnimationUtils;
 import android.widget.Button;
 
-import agency.tango.materialintroscreen.behaviours.MessageButtonBehaviour;
 import agency.tango.materialintroscreen.R;
 import agency.tango.materialintroscreen.adapter.SlidesAdapter;
+import agency.tango.materialintroscreen.behaviours.MessageButtonBehaviour;
 import agency.tango.materialintroscreen.fragments.SlideFragmentBase;
 
-import static agency.tango.materialintroscreen.fragments.SlideFragmentBase.isNotNullOrEmpty;
-
 
 public class MessageButtonBehaviourOnPageSelected implements IPageSelectedListener {
 
@@ -53,7 +52,7 @@ public void onClick(View view) {
     }
 
     private boolean checkIfMessageButtonHasBehaviour(int position) {
-        return messageButtonBehaviours.get(position) != null && isNotNullOrEmpty(
+        return messageButtonBehaviours.get(position) != null && !TextUtils.isEmpty(
                 messageButtonBehaviours.get(position).getMessageButtonText());
     }