diff --git a/src/main/resources/ch/ethz/seb/sebserver/gui/service/session/proctoring/zoomWindow.html b/src/main/resources/ch/ethz/seb/sebserver/gui/service/session/proctoring/zoomWindow.html
index f5130ed3..2ee22bc5 100644
--- a/src/main/resources/ch/ethz/seb/sebserver/gui/service/session/proctoring/zoomWindow.html
+++ b/src/main/resources/ch/ethz/seb/sebserver/gui/service/session/proctoring/zoomWindow.html
@@ -61,7 +61,7 @@
                 isShowJoiningErrorDialog: true, // optional,
                 inviteUrlFormat: '', // optional
                 loginWindow: {  // optional,
-                    width: 400,
+                    width: window.innerWidth - 5,
                     height: window.innerHeight - 4
                 },
                 meetingInfo: [ // optional
diff --git a/src/test/java/ch/ethz/seb/sebserver/gui/service/session/proctoring/ZoomWindowScriptResolverTest.java b/src/test/java/ch/ethz/seb/sebserver/gui/service/session/proctoring/ZoomWindowScriptResolverTest.java
index 0bbd3517..998e5434 100644
--- a/src/test/java/ch/ethz/seb/sebserver/gui/service/session/proctoring/ZoomWindowScriptResolverTest.java
+++ b/src/test/java/ch/ethz/seb/sebserver/gui/service/session/proctoring/ZoomWindowScriptResolverTest.java
@@ -128,7 +128,7 @@ public class ZoomWindowScriptResolverTest {
                         + "                isShowJoiningErrorDialog: true, // optional,\r\n"
                         + "                inviteUrlFormat: '', // optional\r\n"
                         + "                loginWindow: {  // optional,\r\n"
-                        + "                    width: 400,\r\n"
+                        + "                    width: window.innerWidth - 5,\r\n"
                         + "                    height: window.innerHeight - 4\r\n"
                         + "                },\r\n"
                         + "                meetingInfo: [ // optional\r\n"