diff --git a/samples/spring-flo-sample/src/main/resources/static/icons/error.svg b/samples/spring-flo-sample/src/main/resources/static/icons/error.svg
index c6c8388..dc85891 100644
--- a/samples/spring-flo-sample/src/main/resources/static/icons/error.svg
+++ b/samples/spring-flo-sample/src/main/resources/static/icons/error.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "https://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
 	 width="27.963px" height="27.963px" viewBox="0 0 27.963 27.963" style="enable-background:new 0 0 27.963 27.963;"
 	 xml:space="preserve">
diff --git a/samples/spring-flo-sample/src/main/resources/static/icons/rotate.svg b/samples/spring-flo-sample/src/main/resources/static/icons/rotate.svg
index 9248e1b..3d5087d 100644
--- a/samples/spring-flo-sample/src/main/resources/static/icons/rotate.svg
+++ b/samples/spring-flo-sample/src/main/resources/static/icons/rotate.svg
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- Generator: Adobe Illustrator 17.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "https://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
 	 width="1000px" height="1000px" viewBox="0 0 1000 1000" enable-background="new 0 0 1000 1000" xml:space="preserve">
 <g>
diff --git a/samples/spring-flo-si/src/main/resources/static/icons/error.svg b/samples/spring-flo-si/src/main/resources/static/icons/error.svg
index c6c8388..dc85891 100644
--- a/samples/spring-flo-si/src/main/resources/static/icons/error.svg
+++ b/samples/spring-flo-si/src/main/resources/static/icons/error.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "https://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
 	 width="27.963px" height="27.963px" viewBox="0 0 27.963 27.963" style="enable-background:new 0 0 27.963 27.963;"
 	 xml:space="preserve">
diff --git a/samples/spring-flo-si/src/main/resources/static/icons/rotate.svg b/samples/spring-flo-si/src/main/resources/static/icons/rotate.svg
index 9248e1b..3d5087d 100644
--- a/samples/spring-flo-si/src/main/resources/static/icons/rotate.svg
+++ b/samples/spring-flo-si/src/main/resources/static/icons/rotate.svg
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- Generator: Adobe Illustrator 17.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "https://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
 	 width="1000px" height="1000px" viewBox="0 0 1000 1000" enable-background="new 0 0 1000 1000" xml:space="preserve">
 <g>