diff --git a/src/Mod/TechDraw/Gui/QGIView.cpp b/src/Mod/TechDraw/Gui/QGIView.cpp
index cd8dfff134..71d7fe6913 100644
--- a/src/Mod/TechDraw/Gui/QGIView.cpp
+++ b/src/Mod/TechDraw/Gui/QGIView.cpp
@@ -113,7 +113,7 @@ QGIView::QGIView()
     addToGroup(m_caption);
     m_lock = new QGCustomImage();
     m_lock->setParentItem(m_border);
-    m_lock->load(QString::fromUtf8(":/icons/techdraw-lock.png"));
+    m_lock->load(QString::fromUtf8(":/icons/TechDraw_Lock.svg"));
     QSize sizeLock = m_lock->imageSize();
     m_lockWidth = (double) sizeLock.width();
     m_lockHeight = (double) sizeLock.height();
diff --git a/src/Mod/TechDraw/Gui/Resources/TechDraw.qrc b/src/Mod/TechDraw/Gui/Resources/TechDraw.qrc
index ff467cabed..6fe6e9d8a4 100644
--- a/src/Mod/TechDraw/Gui/Resources/TechDraw.qrc
+++ b/src/Mod/TechDraw/Gui/Resources/TechDraw.qrc
@@ -96,7 +96,7 @@
         <file>icons/dashDot-line.svg</file>
         <file>icons/dashDotDot-line.svg</file>
         <file>icons/dash-line.svg</file>
-        <file>icons/techdraw-lock.png</file>
+        <file>icons/TechDraw_Lock.svg</file>
         <file>icons/cursor-balloon.png</file>
         <file>icons/none.svg</file>
         <file>icons/circular.svg</file>
diff --git a/src/Mod/TechDraw/Gui/Resources/icons/TechDraw_Lock.svg b/src/Mod/TechDraw/Gui/Resources/icons/TechDraw_Lock.svg
new file mode 100644
index 0000000000..e95a9ade84
--- /dev/null
+++ b/src/Mod/TechDraw/Gui/Resources/icons/TechDraw_Lock.svg
@@ -0,0 +1,445 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
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+   version="1.1"
+   id="svg2980"
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+        <dc:title>TechDraw_Lock</dc:title>
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>[bitacovir]</dc:title>
+          </cc:Agent>
+        </dc:creator>
+        <dc:title>Assembly_Assembly_Constraints_Tree</dc:title>
+        <dc:date>09-04-2021</dc:date>
+        <dc:relation>http://www.freecadweb.org/wiki/index.php?title=Artwork</dc:relation>
+        <dc:publisher>
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+          <cc:Agent>
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+        <dc:contributor>
+          <cc:Agent>
+            <dc:title></dc:title>
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diff --git a/src/Mod/TechDraw/Gui/Resources/icons/techdraw-lock.png b/src/Mod/TechDraw/Gui/Resources/icons/techdraw-lock.png
deleted file mode 100644
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