diff --git a/.discourse-compatibility b/.discourse-compatibility
new file mode 100644
index 0000000..2b7aad5
--- /dev/null
+++ b/.discourse-compatibility
@@ -0,0 +1 @@
+2.8.0.beta3: 7947c0a702bee2df957b0b8baab3b98eb5d91bda
\ No newline at end of file
diff --git a/common/common.scss b/common/common.scss
index e306c60..1ec6b71 100644
--- a/common/common.scss
+++ b/common/common.scss
@@ -76,3 +76,14 @@ body textarea {
 .popup-menu .btn {
   box-shadow: none;
 }
+
+// Personal messages
+
+.archetype-private_message {
+  .topic-body {
+    box-shadow: none;
+    .cooked {
+      @include boxShadow;
+    }
+  }
+}
diff --git a/desktop/desktop.scss b/desktop/desktop.scss
index a708f63..44d2384 100644
--- a/desktop/desktop.scss
+++ b/desktop/desktop.scss
@@ -272,3 +272,14 @@
     }
   }
 }
+
+// Personal messages
+
+.archetype-private_message {
+  .topic-body {
+    margin-left: -2em;
+  }
+  .small-action {
+    max-width: 758px;
+  }
+}