diff --git a/app/proguard-rules.txt b/app/proguard-rules.txt
index 6f83ed04..05366766 100644
--- a/app/proguard-rules.txt
+++ b/app/proguard-rules.txt
@@ -25,6 +25,13 @@
 -dontwarn com.google.android.gms.**
 -dontwarn com.android.volley.toolbox.**
 
+# OkHttp3:
+-keepattributes Signature
+-keepattributes *Annotation*
+-keep class okhttp3.** { *; }
+-keep interface okhttp3.** { *; }
+-dontwarn okhttp3.**
+
 
 # See https://square.github.io/retrofit/
 # Platform calls Class.forName on types which do not exist on Android to determine platform.