diff --git a/res/values-fr/strings.xml b/res/values-fr/strings.xml
index 3da3bf4..6650119 100644
--- a/res/values-fr/strings.xml
+++ b/res/values-fr/strings.xml
@@ -28,6 +28,7 @@
   <string name="pref_character_size_title">Taille des labels</string>
   <string name="pref_character_size_summary">Taille des caractères affichés sur les touches (%.2fx)</string>
   <string name="pref_theme">Thème</string>
+  <string name="pref_theme_e_system">Paramètre système</string>
   <string name="pref_theme_e_dark">Sombre</string>
   <string name="pref_theme_e_light">Clair</string>
   <string name="pref_theme_e_black">Noir</string>
diff --git a/res/values-lv/strings.xml b/res/values-lv/strings.xml
index 312f2b9..48fccda 100644
--- a/res/values-lv/strings.xml
+++ b/res/values-lv/strings.xml
@@ -28,6 +28,7 @@
   <string name="pref_character_size_title">Iezīmes izmērs</string>
   <string name="pref_character_size_summary">Tastatūrā attēloto rakstzīmju izmērs (%.2fx)</string>
   <string name="pref_theme">Izskats</string>
+  <string name="pref_theme_e_system">Ierīces iestatījumi</string>
   <string name="pref_theme_e_dark">Tumšs</string>
   <string name="pref_theme_e_light">Gaišs</string>
   <string name="pref_theme_e_black">Melns</string>
diff --git a/res/values/arrays.xml b/res/values/arrays.xml
index bcc8576..62d791c 100644
--- a/res/values/arrays.xml
+++ b/res/values/arrays.xml
@@ -29,11 +29,13 @@
     <item>4</item>
   </string-array>
   <string-array name="pref_theme_entries">
+    <item>@string/pref_theme_e_system</item>
     <item>@string/pref_theme_e_dark</item>
     <item>@string/pref_theme_e_light</item>
     <item>@string/pref_theme_e_black</item>
   </string-array>
   <string-array name="pref_theme_values">
+    <item>system</item>
     <item>dark</item>
     <item>light</item>
     <item>black</item>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 1ff286a..199fbd2 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -28,6 +28,7 @@
   <string name="pref_character_size_title">Label size</string>
   <string name="pref_character_size_summary">Size of characters displayed on the keyboard (%.2fx)</string>
   <string name="pref_theme">Theme</string>
+  <string name="pref_theme_e_system">System settings</string>
   <string name="pref_theme_e_dark">Dark</string>
   <string name="pref_theme_e_light">Light</string>
   <string name="pref_theme_e_black">Black</string>
diff --git a/res/xml/settings.xml b/res/xml/settings.xml
index c882f00..df5f201 100644
--- a/res/xml/settings.xml
+++ b/res/xml/settings.xml
@@ -15,7 +15,7 @@
     <juloo.common.IntSlideBarPreference android:key="vibrate_duration" android:title="@string/pref_vibrate_duration_title" android:summary="%sms" android:defaultValue="20" min="5" max="50"/>
   </PreferenceCategory>
   <PreferenceCategory android:title="@string/pref_category_style">
-    <ListPreference android:key="theme" android:title="@string/pref_theme" android:summary="%s" android:defaultValue="dark" android:entries="@array/pref_theme_entries" android:entryValues="@array/pref_theme_values"/>
+    <ListPreference android:key="theme" android:title="@string/pref_theme" android:summary="%s" android:defaultValue="system" android:entries="@array/pref_theme_entries" android:entryValues="@array/pref_theme_values"/>
     <juloo.common.IntSlideBarPreference android:key="margin_bottom" android:title="@string/pref_margin_bottom_title" android:summary="%sdp" android:defaultValue="5" min="0" max="100"/>
     <juloo.common.IntSlideBarPreference android:key="key_height" android:title="@string/pref_key_height_title" android:summary="%sdp" android:defaultValue="50" min="30" max="90"/>
     <juloo.common.IntSlideBarPreference android:key="horizontal_margin" android:title="@string/pref_horizontal_margin_title" android:summary="%sdp" android:defaultValue="3" min="0" max="20"/>
diff --git a/srcs/juloo.keyboard2/Config.java b/srcs/juloo.keyboard2/Config.java
index 42f983e..fb55955 100644
--- a/srcs/juloo.keyboard2/Config.java
+++ b/srcs/juloo.keyboard2/Config.java
@@ -2,7 +2,9 @@ package juloo.keyboard2;
 
 import android.content.Context;
 import android.content.res.Resources;
+import android.content.res.Configuration;
 import android.content.SharedPreferences;
+import android.os.Build;
 import android.preference.PreferenceManager;
 import android.util.DisplayMetrics;
 import android.util.TypedValue;
@@ -77,7 +79,8 @@ final class Config
   public void refresh(Context context)
   {
     SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
-    DisplayMetrics dm = context.getResources().getDisplayMetrics();
+    Resources res = context.getResources();
+    DisplayMetrics dm = res.getDisplayMetrics();
     layout = layoutId_of_string(prefs.getString("layout", "system"));
     swipe_dist_dp = Float.valueOf(prefs.getString("swipe_dist", "15"));
     swipe_dist_px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, swipe_dist_dp, dm);
@@ -93,7 +96,7 @@ final class Config
     preciseRepeat = prefs.getBoolean("precise_repeat", preciseRepeat);
     characterSize = prefs.getFloat("character_size", characterSize);
     accents = Integer.valueOf(prefs.getString("accents", "1"));
-    theme = themeId_of_string(prefs.getString("theme", ""));
+    theme = getThemeId(res, prefs.getString("theme", ""));
   }
 
   private float getDipPref(DisplayMetrics dm, SharedPreferences prefs, String pref_name, float def)
@@ -104,6 +107,25 @@ final class Config
     return (TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, value, dm));
   }
 
+  private int getThemeId(Resources res, String theme_name)
+  {
+    switch (theme_name)
+    {
+      case "light": return R.style.Light;
+      case "black": return R.style.Black;
+      case "dark": return R.style.Dark;
+      default:
+      case "system":
+        if (Build.VERSION.SDK_INT >= 8)
+        {
+          int night_mode = res.getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
+          if ((night_mode & Configuration.UI_MODE_NIGHT_NO) != 0)
+            return R.style.Light;
+        }
+        return R.style.Dark;
+    }
+  }
+
   public static int layoutId_of_string(String name)
   {
     switch (name)
diff --git a/srcs/juloo.keyboard2/Keyboard2.java b/srcs/juloo.keyboard2/Keyboard2.java
index fa4b494..54fe587 100644
--- a/srcs/juloo.keyboard2/Keyboard2.java
+++ b/srcs/juloo.keyboard2/Keyboard2.java
@@ -57,6 +57,7 @@ public class Keyboard2 extends InputMethodService
     PreferenceManager.getDefaultSharedPreferences(this).registerOnSharedPreferenceChangeListener(this);
     Config.initGlobalConfig(this, new KeyEventHandler(this.new Receiver()));
     _config = Config.globalConfig();
+    _config.refresh(this);
     _keyboardView = (Keyboard2View)inflate_view(R.layout.keyboard);
     _keyboardView.reset();
   }
@@ -177,17 +178,27 @@ public class Keyboard2 extends InputMethodService
     }
   }
 
+  private void refreshConfig()
+  {
+    int prev_theme = _config.theme;
+    _config.refresh(this);
+    refreshSubtypeImm();
+    // Refreshing the theme config requires re-creating the views
+    if (prev_theme != _config.theme)
+    {
+      _keyboardView = (Keyboard2View)inflate_view(R.layout.keyboard);
+      _emojiPane = null;
+    }
+    _keyboardView.setKeyboard(getLayout(_currentTextLayout));
+  }
+
   @Override
   public void onStartInputView(EditorInfo info, boolean restarting)
   {
-    // Update '_config' before calling 'KeyboardView.setKeyboard'
-    refreshSubtypeImm();
+    refreshConfig();
     refreshEditorInfo(info);
     if ((info.inputType & InputType.TYPE_CLASS_NUMBER) != 0)
       _keyboardView.setKeyboard(getLayout(R.xml.numeric));
-    else
-      _keyboardView.setKeyboard(getLayout(_currentTextLayout));
-    _keyboardView.reset(); // Layout might need to change due to rotation
     setInputView(_keyboardView);
   }
 
@@ -217,16 +228,7 @@ public class Keyboard2 extends InputMethodService
   @Override
   public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key)
   {
-    int prev_theme = _config.theme;
-    _config.refresh(this);
-    refreshSubtypeImm();
-    _keyboardView.setKeyboard(getLayout(_currentTextLayout));
-    // Refreshing the theme config requires re-creating the views
-    if (prev_theme != _config.theme)
-    {
-      _keyboardView = (Keyboard2View)inflate_view(R.layout.keyboard);
-      _emojiPane = null;
-    }
+    refreshConfig();
   }
 
   /** Not static */