diff --git a/app/src/main/java/fr/free/nrw/commons/explore/SearchActivity.java b/app/src/main/java/fr/free/nrw/commons/explore/SearchActivity.java
index 7717f2deb..abb27184f 100644
--- a/app/src/main/java/fr/free/nrw/commons/explore/SearchActivity.java
+++ b/app/src/main/java/fr/free/nrw/commons/explore/SearchActivity.java
@@ -28,6 +28,7 @@ import io.reactivex.android.schedulers.AndroidSchedulers;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
+import java.util.Locale;
 import java.util.concurrent.TimeUnit;
 import javax.inject.Inject;
 import timber.log.Timber;
@@ -95,11 +96,11 @@ public class SearchActivity extends BaseActivity
         searchDepictionsFragment = new SearchDepictionsFragment();
         searchCategoryFragment= new SearchCategoryFragment();
         fragmentList.add(searchMediaFragment);
-        titleList.add(getResources().getString(R.string.search_tab_title_media).toUpperCase());
+        titleList.add(getResources().getString(R.string.search_tab_title_media).toUpperCase(Locale.ROOT));
         fragmentList.add(searchCategoryFragment);
-        titleList.add(getResources().getString(R.string.search_tab_title_categories).toUpperCase());
+        titleList.add(getResources().getString(R.string.search_tab_title_categories).toUpperCase(Locale.ROOT));
         fragmentList.add(searchDepictionsFragment);
-        titleList.add(getResources().getString(R.string.search_tab_title_depictions).toUpperCase());
+        titleList.add(getResources().getString(R.string.search_tab_title_depictions).toUpperCase(Locale.ROOT));
 
         viewPagerAdapter.setTabData(fragmentList, titleList);
         viewPagerAdapter.notifyDataSetChanged();