diff --git a/ansible/vars/default.yml b/ansible/vars/default.yml
index 027bee7..46a19a0 100644
--- a/ansible/vars/default.yml
+++ b/ansible/vars/default.yml
@@ -1,7 +1,7 @@
 ---
 
 tljh_plasma: git+https://github.com/plasmabio/plasma@master#"egg=tljh-plasma&subdirectory=tljh-plasma"
-tljh_repo2docker: tljh_repo2docker==3.0.9
+tljh_repo2docker: tljh_repo2docker==3.0.11
 tljh_installer_dest: /srv/tljh-installer.py
 tljh_prefix: /opt/tljh
 tljh_installer_url: https://tljh.jupyter.org/bootstrap.py
diff --git a/tljh-plasma/tljh_plasma/static/css/style.css b/tljh-plasma/tljh_plasma/static/css/style.css
index 365ece3..2e1aaef 100644
--- a/tljh-plasma/tljh_plasma/static/css/style.css
+++ b/tljh-plasma/tljh_plasma/static/css/style.css
@@ -144,3 +144,42 @@ fieldset legend {
 .form-submit button.submit:focus {
   outline: none;
 }
+
+@media (prefers-color-scheme: dark) {
+  fieldset {
+    background-color: #2a2a2a;
+    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
+  }
+
+  .group-select {
+    background-color: #3a3a3a;
+    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
+  }
+
+  .group-select .form-control {
+    background-color: #2e2e2e;
+    border-color: #555;
+    color: #ddd;
+  }
+
+  .group-select .form-control:focus {
+    background-color: #3a3a3a;
+    border-color: #6a9fd8;
+  }
+
+  .group-select .remove-group {
+    color: #ccc;
+  }
+
+  .group-select .remove-group:hover {
+    color: #fff;
+  }
+
+  .env-owner {
+    color: #aaa;
+  }
+
+  .form-submit {
+    background-color: transparent;
+  }
+}