diff --git a/proguard/rules/moshi.pro b/proguard/rules/moshi.pro
index 3bae28e..fe81601 100644
--- a/proguard/rules/moshi.pro
+++ b/proguard/rules/moshi.pro
@@ -6,6 +6,7 @@
 }
 
 -keep @com.squareup.moshi.JsonQualifier interface *
+-keep @com.squareup.moshi.JsonQualifier class *
 
 # Enum field names are used by the integrated EnumJsonAdapter.
 # values() is synthesized by the Kotlin compiler and is used by EnumJsonAdapter indirectly