diff --git a/ChangeLog.md b/ChangeLog.md
index 8572b7d..3f808bb 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- Correct generation of api-author signatures
 
 ## [v0.3.2] - 2020-01-08
 ### Fixed
diff --git a/learnosity_sdk/request/init.py b/learnosity_sdk/request/init.py
index 480ab7b..4c39915 100644
--- a/learnosity_sdk/request/init.py
+++ b/learnosity_sdk/request/init.py
@@ -186,6 +186,8 @@ def validate(self):
     def set_service_options(self):
         if self.service == 'questions':
             self.sign_request_data = False
+        elif self.service == 'author':
+            self.sign_request_data = False
         elif self.service == 'assess':
             self.sign_request_data = False