diff --git a/proxy/src/main/java/google/registry/proxy/ProxyModule.java b/proxy/src/main/java/google/registry/proxy/ProxyModule.java
index 6e36e6bf4..eb6e92b3a 100644
--- a/proxy/src/main/java/google/registry/proxy/ProxyModule.java
+++ b/proxy/src/main/java/google/registry/proxy/ProxyModule.java
@@ -333,7 +333,7 @@ public class ProxyModule {
     if (env == Environment.LOCAL) {
       return Mode.SELF_SIGNED;
     } else {
-      return Mode.P12_FILE;
+      return Mode.PEM_FILE;
     }
   }