diff --git a/res/drawable/page1-en.png b/res/drawable/page1_en.png
similarity index 100%
rename from res/drawable/page1-en.png
rename to res/drawable/page1_en.png
diff --git a/res/drawable/page2-en.png b/res/drawable/page2_en.png
similarity index 100%
rename from res/drawable/page2-en.png
rename to res/drawable/page2_en.png