diff --git a/proguard-android-optimize.txt b/proguard-android-optimize.txt
index e2095ad66f..27b0b76664 100644
--- a/proguard-android-optimize.txt
+++ b/proguard-android-optimize.txt
@@ -1,10 +1,12 @@
 -allowaccessmodification
+-dontoptimize
 -dontpreverify
 -dontusemixedcaseclassnames
 -dontskipnonpubliclibraryclasses
 -verbose
 
 -keepattributes *Annotation*
+-keepattributes SourceFile,LineNumberTable
 
 -keepclasseswithmembernames class * {
     native <methods>;