diff --git a/libraries/proguard-butterknife-7.pro b/libraries/proguard-butterknife-7.pro
index a04d9bc..51bd902 100644
--- a/libraries/proguard-butterknife-7.pro
+++ b/libraries/proguard-butterknife-7.pro
@@ -1,13 +1,10 @@
-# ButterKnife 7
+#ButterKnife 8
 
--keep class butterknife.** { *; }
--dontwarn butterknife.internal.**
--keep class **$$ViewBinder { *; }
+# Retain generated class which implement Unbinder.
+-keep public class * implements butterknife.Unbinder { public <init>(...); }
 
--keepclasseswithmembernames class * {
-    @butterknife.* <fields>;
-}
-
--keepclasseswithmembernames class * {
-    @butterknife.* <methods>;
-}
\ No newline at end of file
+# Prevent obfuscation of types which use ButterKnife annotations since the simple name
+# is used to reflectively look up the generated ViewBinding.
+-keep class butterknife.*
+-keepclasseswithmembernames class * { @butterknife.* <methods>; }
+-keepclasseswithmembernames class * { @butterknife.* <fields>; }