diff --git a/calendar/sync/pom.xml b/calendar/sync/pom.xml
index af98470c..61b65da8 100644
--- a/calendar/sync/pom.xml
+++ b/calendar/sync/pom.xml
@@ -97,7 +97,7 @@
     </dependencies>
 
     <properties>
-        <project.http.version>1.41.0</project.http.version>
+        <project.http.version>1.47.0</project.http.version>
         <project.oauth.version>1.32.1</project.oauth.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>