diff --git a/src/main/java/org/gitlab4j/api/utils/MaskingLoggingFilter.java b/src/main/java/org/gitlab4j/api/utils/MaskingLoggingFilter.java
index 71cd1a201881b909eddc5bc5d8dc1511620a4c3d..b6c067b4b62a1622636199a6795b8a1f07952011 100644
--- a/src/main/java/org/gitlab4j/api/utils/MaskingLoggingFilter.java
+++ b/src/main/java/org/gitlab4j/api/utils/MaskingLoggingFilter.java
@@ -47,7 +47,7 @@ public class MaskingLoggingFilter implements ClientRequestFilter, ClientResponse
      * Default list of header names that should be masked.
      */
     public static final List<String> DEFAULT_MASKED_HEADER_NAMES = 
-            Collections.unmodifiableList(Arrays.asList("PRIVATE-TOKEN", "Authorization"));
+            Collections.unmodifiableList(Arrays.asList("PRIVATE-TOKEN", "Authorization", "Proxy-Authorization"));
 
     /**
      * Prefix for request log entries.