diff --git a/src/java/davmail/caldav/CaldavConnection.java b/src/java/davmail/caldav/CaldavConnection.java
index 6f1fd80d..a10cc577 100644
--- a/src/java/davmail/caldav/CaldavConnection.java
+++ b/src/java/davmail/caldav/CaldavConnection.java
@@ -1396,7 +1396,9 @@ public class CaldavConnection extends AbstractConnection {
 
         protected void buildDepth() {
             String depthValue = headers.get("depth");
-            if (depthValue != null) {
+            if ("infinity".equalsIgnoreCase(depthValue)) {
+                depth = Integer.MAX_VALUE;
+            } else if (depthValue != null) {
                 try {
                     depth = Integer.valueOf(depthValue);
                 } catch (NumberFormatException e) {