diff --git a/app/build.gradle b/app/build.gradle
index d593295..4d78e64 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -41,9 +41,9 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:3.18.8'
+    implementation 'com.simplemobiletools:commons:3.19.0'
     implementation 'com.squareup:otto:1.3.8'
-    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
 }
 
 Properties props = new Properties()
diff --git a/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/BrightDisplayActivity.kt b/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/BrightDisplayActivity.kt
index cf5d051..4a18204 100644
--- a/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/BrightDisplayActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/BrightDisplayActivity.kt
@@ -1,5 +1,6 @@
 package com.simplemobiletools.flashlight.activities
 
+import android.content.pm.ActivityInfo
 import android.graphics.drawable.ColorDrawable
 import android.os.Bundle
 import android.view.WindowManager
@@ -34,6 +35,10 @@ class BrightDisplayActivity : SimpleActivity() {
         super.onResume()
         window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
         toggleBrightness(true)
+
+        if (config.forcePortrait) {
+            requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
+        }
     }
 
     override fun onPause() {
diff --git a/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/MainActivity.kt b/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/MainActivity.kt
index e645073..7695cc2 100644
--- a/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/MainActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/MainActivity.kt
@@ -1,6 +1,7 @@
 package com.simplemobiletools.flashlight.activities
 
 import android.content.Intent
+import android.content.pm.ActivityInfo
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
@@ -68,6 +69,10 @@ class MainActivity : SimpleActivity() {
         if (stroboscope_bar.isInvisible()) {
             changeIconColor(config.backgroundColor.getContrastColor(), stroboscope_btn)
         }
+
+        if (config.forcePortrait) {
+            requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
+        }
     }
 
     override fun onStart() {
diff --git a/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/SettingsActivity.kt b/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/SettingsActivity.kt
index b03fe8c..5dacd7e 100644
--- a/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/SettingsActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/flashlight/activities/SettingsActivity.kt
@@ -23,6 +23,7 @@ class SettingsActivity : SimpleActivity() {
         setupTurnFlashlightOn()
         setupBrightDisplay()
         setupStroboscope()
+        setupForcePortrait()
         updateTextColors(settings_holder)
     }
 
@@ -73,4 +74,12 @@ class SettingsActivity : SimpleActivity() {
             config.stroboscope = settings_stroboscope.isChecked
         }
     }
+
+    private fun setupForcePortrait() {
+        settings_force_portrait.isChecked = config.forcePortrait
+        settings_force_portrait_holder.setOnClickListener {
+            settings_force_portrait.toggle()
+            config.forcePortrait = settings_force_portrait.isChecked
+        }
+    }
 }
diff --git a/app/src/main/res/layout/activity_settings.xml b/app/src/main/res/layout/activity_settings.xml
index 4455dae..5124d0c 100644
--- a/app/src/main/res/layout/activity_settings.xml
+++ b/app/src/main/res/layout/activity_settings.xml
@@ -147,5 +147,28 @@
                 android:text="@string/show_stroboscope"/>
 
         </RelativeLayout>
+
+        <RelativeLayout
+            android:id="@+id/settings_force_portrait_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:background="?attr/selectableItemBackground"
+            android:paddingBottom="@dimen/activity_margin"
+            android:paddingLeft="@dimen/normal_margin"
+            android:paddingRight="@dimen/normal_margin"
+            android:paddingTop="@dimen/activity_margin">
+
+            <com.simplemobiletools.commons.views.MySwitchCompat
+                android:id="@+id/settings_force_portrait"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:background="@null"
+                android:clickable="false"
+                android:paddingLeft="@dimen/medium_margin"
+                android:paddingStart="@dimen/medium_margin"
+                android:text="@string/force_portrait_mode"/>
+
+        </RelativeLayout>
     </LinearLayout>
 </ScrollView>
diff --git a/build.gradle b/build.gradle
index e6abf43..af56fd9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,7 +9,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.0'
+        classpath 'com.android.tools.build:gradle:3.1.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong