diff --git a/app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.java b/app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.java
deleted file mode 100644
index 40174c5..0000000
--- a/app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.java
+++ /dev/null
@@ -1,69 +0,0 @@
-package com.wbrawner.simplemarkdown.view.fragment;
-
-import android.content.SharedPreferences;
-import android.os.Bundle;
-import android.preference.ListPreference;
-import android.preference.Preference;
-import android.preference.PreferenceFragment;
-import android.preference.PreferenceManager;
-import android.util.Log;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-import androidx.annotation.Nullable;
-
-import com.wbrawner.simplemarkdown.BuildConfig;
-import com.wbrawner.simplemarkdown.R;
-
-public class SettingsFragment extends PreferenceFragment
-        implements SharedPreferences.OnSharedPreferenceChangeListener {
-    @Override
-    public void onCreate(@Nullable Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        addPreferencesFromResource(R.xml.pref_general);
-        SharedPreferences sharedPreferences =
-                PreferenceManager.getDefaultSharedPreferences(getActivity());
-        sharedPreferences.registerOnSharedPreferenceChangeListener(this);
-        setListPreferenceSummary(
-                sharedPreferences,
-                findPreference(getString(R.string.key_default_view))
-        );
-        if (!BuildConfig.ENABLE_CUSTOM_CSS) {
-            getPreferenceScreen().removePreference(findPreference(getString(R.string.pref_custom_css)));
-        }
-    }
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
-                             @Nullable Bundle savedInstanceState) {
-
-        return inflater.inflate(R.layout.preference_list_fragment_safe, container, false);
-    }
-
-    @Override
-    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
-        Preference preference = findPreference(key);
-
-        if (preference instanceof ListPreference) {
-            setListPreferenceSummary(sharedPreferences, preference);
-        }
-    }
-
-    private void setListPreferenceSummary(SharedPreferences sharedPreferences, Preference preference) {
-        ListPreference listPreference = (ListPreference) preference;
-        String storedValue = sharedPreferences.getString(preference.getKey(), "");
-        if (storedValue.isEmpty()) {
-            return;
-        }
-        int index = 0;
-        try {
-            index = Integer.valueOf(storedValue);
-        } catch (NumberFormatException e) {
-            // TODO: Report this?
-            Log.e("SimpleMarkdown", "Unable to parse " + storedValue + " to integer");
-        }
-        String summary = listPreference.getEntries()[index].toString();
-        preference.setSummary(summary);
-    }
-}
diff --git a/app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.kt b/app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.kt
new file mode 100644
index 0000000..3f34877
--- /dev/null
+++ b/app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.kt
@@ -0,0 +1,63 @@
+package com.wbrawner.simplemarkdown.view.fragment
+
+import android.content.SharedPreferences
+import android.os.Bundle
+import android.preference.ListPreference
+import android.preference.Preference
+import android.preference.PreferenceFragment
+import android.preference.PreferenceManager
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+
+import com.wbrawner.simplemarkdown.BuildConfig
+import com.wbrawner.simplemarkdown.R
+
+class SettingsFragment : PreferenceFragment(), SharedPreferences.OnSharedPreferenceChangeListener {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        addPreferencesFromResource(R.xml.pref_general)
+        val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(activity)
+        sharedPreferences.registerOnSharedPreferenceChangeListener(this)
+        setListPreferenceSummary(
+                sharedPreferences,
+                findPreference(getString(R.string.key_default_view))
+        )
+        if (!BuildConfig.ENABLE_CUSTOM_CSS) {
+            preferenceScreen.removePreference(findPreference(getString(R.string.pref_custom_css)))
+        }
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
+                              savedInstanceState: Bundle?): View? {
+
+        return inflater.inflate(R.layout.preference_list_fragment_safe, container, false)
+    }
+
+    override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String) {
+        val preference = findPreference(key)
+
+        if (preference is ListPreference) {
+            setListPreferenceSummary(sharedPreferences, preference)
+        }
+    }
+
+    private fun setListPreferenceSummary(sharedPreferences: SharedPreferences, preference: Preference) {
+        val listPreference = preference as ListPreference
+        val storedValue = sharedPreferences.getString(preference.getKey(), "")
+        if (storedValue!!.isEmpty()) {
+            return
+        }
+        var index = 0
+        try {
+            index = Integer.valueOf(storedValue)
+        } catch (e: NumberFormatException) {
+            // TODO: Report this?
+            Log.e("SimpleMarkdown", "Unable to parse $storedValue to integer")
+        }
+
+        val summary = listPreference.entries[index].toString()
+        preference.setSummary(summary)
+    }
+}