diff --git a/static/html/5xx.html b/static/html/5xx.html
index dd5abdde29..04f4847175 100644
--- a/static/html/5xx.html
+++ b/static/html/5xx.html
@@ -22,7 +22,7 @@
                 <div class="float-left">
                     <div>
                         <a class="brand logo" href="https://zulipchat.com/">
-                            <svg class="brand-logo" xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 40 40" version="1.1">
+                            <svg class="brand-logo" xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 40 40" version="1.1">
                                 <g transform="translate(-297.14285,-466.64792)">
                                     <circle cx="317.14285" cy="486.64792" r="19.030317" style="fill:hsl(156, 100%, 24%)!important;stroke-width:1.93936479;stroke:transparent"></circle>
                                     <path d="m309.24286 477.14791 14.2 0 1.6 3.9-11.2 11.9 9.6 0 1.6 3.2-14.2 0-1.6-3.9 11.2-11.9-9.6 0z" style="fill:#52c2af;stroke:#52c2af"></path>
diff --git a/templates/zerver/app/home.html b/templates/zerver/app/home.html
index d9673c7ae3..2e1664806f 100644
--- a/templates/zerver/app/home.html
+++ b/templates/zerver/app/home.html
@@ -1,7 +1,7 @@
 {# Home tab of the app, containing messages. #}
 <div class="message_area_padder message_list" id="main_div">
     <div class="top-messages-logo">
-        <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 40 40" version="1.1">
+        <svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 40 40" version="1.1">
             <g transform="translate(-297.14285,-466.64792)">
                 <circle cx="317.14285" cy="486.64792" r="19.030317" style="stroke-width:1.93936479;"/>
                 <path d="m309.24286 477.14791 14.2 0 1.6 3.9-11.2 11.9 9.6 0 1.6 3.2-14.2 0-1.6-3.9 11.2-11.9-9.6 0z"/>
diff --git a/templates/zerver/landing_nav.html b/templates/zerver/landing_nav.html
index b4bc21c25c..3095a0190d 100644
--- a/templates/zerver/landing_nav.html
+++ b/templates/zerver/landing_nav.html
@@ -1,7 +1,7 @@
 <nav class="portico-header">
     <div class="content">
         <a class="brand logo" href="{{ root_domain_uri }}">
-            <svg class="brand-logo" xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 40 40" version="1.1">
+            <svg class="brand-logo" xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 40 40" version="1.1">
                 <g transform="translate(-297.14285,-466.64792)">
                     <circle cx="317.14285" cy="486.64792" r="19.030317" style="fill:#fff;stroke-width:1.93936479;stroke:transparent"></circle>
                     <path d="m309.24286 477.14791 14.2 0 1.6 3.9-11.2 11.9 9.6 0 1.6 3.2-14.2 0-1.6-3.9 11.2-11.9-9.6 0z" style="fill:#52c2af;stroke:#52c2af"></path>
diff --git a/templates/zerver/portico-header.html b/templates/zerver/portico-header.html
index 09a8a73a75..0b1ae41ad6 100644
--- a/templates/zerver/portico-header.html
+++ b/templates/zerver/portico-header.html
@@ -6,7 +6,7 @@
                 <a class="brand logo" href="{{ root_domain_uri }}/"><img draggable="false" src="{{ custom_logo_url }}" class="portico-logo" alt="{{ _('Zulip') }}" content="Zulip" /></a>
                 {% else %}
                 <a class="brand logo" href="{{ root_domain_uri }}{% if page_is_help_center %}/help/{% endif %}">
-                    <svg class="brand-logo" xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 40 40" version="1.1">
+                    <svg class="brand-logo" xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 40 40" version="1.1">
                         <g transform="translate(-297.14285,-466.64792)">
                             <circle cx="317.14285" cy="486.64792" r="19.030317" style="fill:#fff;stroke-width:1.93936479;stroke:transparent"></circle>
                             <path d="m309.24286 477.14791 14.2 0 1.6 3.9-11.2 11.9 9.6 0 1.6 3.2-14.2 0-1.6-3.9 11.2-11.9-9.6 0z" style="fill:#52c2af;stroke:#52c2af"></path>