diff --git a/deployment/docker/error_403.html b/deployment/docker/error_403.html
index 1239488d45946910bdb921ff730f04644c0fe7bc..7125403c95f31878538c092e5d96220372de8164 100644
--- a/deployment/docker/error_403.html
+++ b/deployment/docker/error_403.html
@@ -1,4 +1,7 @@
 <!DOCTYPE html>
 <html lang="en">
+  <head>
+    <title>403 - Forbidden</title>
+  </head>
   <body>You don't have access to this location.</body>
 </html>
diff --git a/deployment/docker/error_404.html b/deployment/docker/error_404.html
index b9ef2ebcf96de09f9a054f2ff63e57301fc72554..6d51aaae3c21b21780ab9de30d1ed261f9d08d0e 100644
--- a/deployment/docker/error_404.html
+++ b/deployment/docker/error_404.html
@@ -1,4 +1,7 @@
 <!DOCTYPE html>
 <html lang="en">
+  <head>
+    <title>404 - Not Found</title>
+  </head>
   <body>This is not the page you're looking for.</body>
 </html>
diff --git a/deployment/docker/error_50x.html b/deployment/docker/error_50x.html
index e96d64eda8d63e5b6a42b8422415d7079829cbad..856cdc7e3300bc6c72499e449bb57ad06e7fe25c 100644
--- a/deployment/docker/error_50x.html
+++ b/deployment/docker/error_50x.html
@@ -1,4 +1,7 @@
 <!DOCTYPE html>
 <html lang="en">
+  <head>
+    <title>500 - Internal Server Error</title>
+  </head>
   <body>Please stand by, application will be available again shortly.</body>
 </html>
diff --git a/deployment/docker/index.html b/deployment/docker/index.html
index c1afa7cd1f46793fd68785e0bf73f8c8cb5a24e2..830eb1fdbcf8006dc0753dd7a7b117bb2b49f61c 100644
--- a/deployment/docker/index.html
+++ b/deployment/docker/index.html
@@ -1,4 +1,7 @@
 <!DOCTYPE html>
 <html lang="en">
+  <head>
+    <title>Invalid Path</title>
+  </head>
   <body>There is nothing to be seen here.</body>
 </html>
diff --git a/src/core/templates/core/directmessage.html b/src/core/templates/core/directmessage.html
index 1f0ef673e7f0ed685228345b9385c5b280971055..42afd5ebaae58258e53c305f346c644c0e461096 100644
--- a/src/core/templates/core/directmessage.html
+++ b/src/core/templates/core/directmessage.html
@@ -1,5 +1,8 @@
 <!DOCTYPE html5>
 <html lang="de">
+  <head>
+    <title>Nachricht</title>
+  </head>
   <body>
     {% if conference != None %}
       <h1>