diff --git a/styles/dialog.less b/styles/dialog.less
index a60a033..53ba4d6 100644
--- a/styles/dialog.less
+++ b/styles/dialog.less
@@ -2,9 +2,10 @@
 
 .git-control .dialog {
   position: absolute;
-  bottom: -20%;
-  right: 20%;
-  left: 20%;
+  top: 50%;
+  left: 50%;
+  transform: translate3d(-50%, -50%, 0);
+  min-width: 50%;
   background: @inset-panel-background-color;
   border: 1px solid @inset-panel-border-color;
   border-radius: 4px;