diff --git a/public/assets/images/map1.svg b/public/assets/images/map1.svg
index bdb6a53..6f7f624 100644
--- a/public/assets/images/map1.svg
+++ b/public/assets/images/map1.svg
@@ -1,6 +1,4 @@
 <?xml version="1.0" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
-  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg viewBox="-18 -150 2320 3360" xmlns="http://www.w3.org/2000/svg">
   <link xmlns="http://www.w3.org/1999/xhtml" rel="stylesheet" href="../css/map.css" type="text/css"/>
   <style>
diff --git a/public/assets/images/map2.svg b/public/assets/images/map2.svg
index 542d8f0..64be1d3 100644
--- a/public/assets/images/map2.svg
+++ b/public/assets/images/map2.svg
@@ -1,6 +1,4 @@
 <?xml version="1.0" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
-  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg viewBox="-150 -150 600 800" xmlns="http://www.w3.org/2000/svg">
   <link xmlns="http://www.w3.org/1999/xhtml" rel="stylesheet" href="../css/map.css" type="text/css"/>
   <style>
diff --git a/public/assets/images/map3.svg b/public/assets/images/map3.svg
index 9545a47..e2a92a8 100644
--- a/public/assets/images/map3.svg
+++ b/public/assets/images/map3.svg
@@ -1,6 +1,4 @@
 <?xml version="1.0" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
-  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg viewBox="-150 -150 600 800" xmlns="http://www.w3.org/2000/svg">
   <link xmlns="http://www.w3.org/1999/xhtml" rel="stylesheet" href="../css/map.css" type="text/css"/>
   <style>
diff --git a/public/assets/images/map4.svg b/public/assets/images/map4.svg
index e0ce981..2e9319d 100644
--- a/public/assets/images/map4.svg
+++ b/public/assets/images/map4.svg
@@ -1,6 +1,4 @@
 <?xml version="1.0" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
-  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg viewBox="-150 -150 600 800" xmlns="http://www.w3.org/2000/svg">
   <link xmlns="http://www.w3.org/1999/xhtml" rel="stylesheet" href="../css/map.css" type="text/css"/>
   <defs>
diff --git a/public/assets/images/test.svg b/public/assets/images/test.svg
index 0e257ce..49bfa9b 100644
--- a/public/assets/images/test.svg
+++ b/public/assets/images/test.svg
@@ -1,6 +1,4 @@
 <?xml version="1.0" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
-  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg viewBox="-5 -5 10 10" xmlns="http://www.w3.org/2000/svg">
   <circle r="5" fill="purple"/>
 </svg>