diff --git a/datasette/templates/allow_debug.html b/datasette/templates/allow_debug.html
index 05e3dd90..6f2a8122 100644
--- a/datasette/templates/allow_debug.html
+++ b/datasette/templates/allow_debug.html
@@ -5,7 +5,7 @@
 {% block extra_head %}
 <style>
 textarea {
-    height: 8em;
+    height: 10em;
     width: 95%;
     box-sizing: border-box;
     padding: 0.5em;