diff --git a/src/main/java/qupath/lib/images/servers/omero/OmeroWebClient.java b/src/main/java/qupath/lib/images/servers/omero/OmeroWebClient.java
index cce735b..0bb7410 100644
--- a/src/main/java/qupath/lib/images/servers/omero/OmeroWebClient.java
+++ b/src/main/java/qupath/lib/images/servers/omero/OmeroWebClient.java
@@ -554,6 +554,7 @@ public void logOut() {
 			timer.cancel();
 			timer = null;
 			username.set("");
+			this.token = null;
 		} catch (IOException e) {
 			logger.error("Could not logout.", e.getLocalizedMessage());
 		}