diff --git a/libraries/proguard-square-retrofit2.pro b/libraries/proguard-square-retrofit2.pro
index f0043c4..586c0f8 100644
--- a/libraries/proguard-square-retrofit2.pro
+++ b/libraries/proguard-square-retrofit2.pro
@@ -5,3 +5,7 @@
 -keep class retrofit2.** { *; }
 -keepattributes Signature
 -keepattributes Exceptions
+
+-keepclasseswithmembers class * {
+    @retrofit2.http.* <methods>;
+}