diff --git a/build.gradle b/build.gradle
index b11a1d4d5d..c15131aec4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -40,10 +40,10 @@ ext {
 	log4jVersion         = "2.11.2"
 	nettyVersion         = "4.1.34.Final"
 	quartzVersion        = "2.3.0"
-	reactorVersion       = "Californium-SR5"
+	reactorVersion       = "Californium-SR6"
 	rxjavaVersion        = "1.3.8"
 	rxjavaAdapterVersion = "1.2.1"
-	rxjava2Version       = "2.2.7"
+	rxjava2Version       = "2.2.8"
 	slf4jVersion         = "1.7.26"	  // spring-jcl + consistent 3rd party deps
 	tiles3Version        = "3.0.8"
 	tomcatVersion        = "9.0.17"
@@ -158,7 +158,7 @@ configure(allprojects) { project ->
 		testCompile("junit:junit:4.12") {
 			exclude group: "org.hamcrest", module: "hamcrest-core"
 		}
-		testCompile("org.mockito:mockito-core:2.25.0") {
+		testCompile("org.mockito:mockito-core:2.25.1") {
 			exclude group: "org.hamcrest", module: "hamcrest-core"
 		}
 		testCompile("io.mockk:mockk:1.9.1")
diff --git a/spring-aop/src/test/resources/org/springframework/aop/target/CommonsPool2TargetSourceProxyTests-context.xml b/spring-aop/src/test/resources/org/springframework/aop/target/CommonsPool2TargetSourceProxyTests-context.xml
index 3095131529..c3c614d4a6 100644
--- a/spring-aop/src/test/resources/org/springframework/aop/target/CommonsPool2TargetSourceProxyTests-context.xml
+++ b/spring-aop/src/test/resources/org/springframework/aop/target/CommonsPool2TargetSourceProxyTests-context.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
- <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
+ <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "https://www.springframework.org/dtd/spring-beans-2.0.dtd">
 
 <beans>
 
diff --git a/spring-aop/src/test/resources/org/springframework/aop/target/HotSwappableTargetSourceTests-context.xml b/spring-aop/src/test/resources/org/springframework/aop/target/HotSwappableTargetSourceTests-context.xml
index c8d4a287f5..dcc43922ef 100644
--- a/spring-aop/src/test/resources/org/springframework/aop/target/HotSwappableTargetSourceTests-context.xml
+++ b/spring-aop/src/test/resources/org/springframework/aop/target/HotSwappableTargetSourceTests-context.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
+<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "https://www.springframework.org/dtd/spring-beans-2.0.dtd">
 
 <beans>
 
diff --git a/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-customTarget.xml b/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-customTarget.xml
index 57c3fb182a..cec1c980ba 100644
--- a/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-customTarget.xml
+++ b/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-customTarget.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
+<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "https://www.springframework.org/dtd/spring-beans-2.0.dtd">
 
 <beans>
 
diff --git a/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-factoryBean.xml b/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-factoryBean.xml
index 4b408a3410..1853c4cd56 100644
--- a/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-factoryBean.xml
+++ b/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-factoryBean.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
+<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "https://www.springframework.org/dtd/spring-beans-2.0.dtd">
 
 <beans>
 
diff --git a/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-singleton.xml b/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-singleton.xml
index 2abdc9f260..1e5c69f549 100644
--- a/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-singleton.xml
+++ b/spring-aop/src/test/resources/org/springframework/aop/target/LazyInitTargetSourceTests-singleton.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
+<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "https://www.springframework.org/dtd/spring-beans-2.0.dtd">
 
 <beans>
 
diff --git a/spring-aop/src/test/resources/org/springframework/aop/target/PrototypeTargetSourceTests-context.xml b/spring-aop/src/test/resources/org/springframework/aop/target/PrototypeTargetSourceTests-context.xml
index 6f45a79a72..4ee787b20f 100644
--- a/spring-aop/src/test/resources/org/springframework/aop/target/PrototypeTargetSourceTests-context.xml
+++ b/spring-aop/src/test/resources/org/springframework/aop/target/PrototypeTargetSourceTests-context.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
+<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "https://www.springframework.org/dtd/spring-beans-2.0.dtd">
 
 <beans>
 
diff --git a/spring-aop/src/test/resources/org/springframework/aop/target/ThreadLocalTargetSourceTests-context.xml b/spring-aop/src/test/resources/org/springframework/aop/target/ThreadLocalTargetSourceTests-context.xml
index 57e3ce659b..6400db2f21 100644
--- a/spring-aop/src/test/resources/org/springframework/aop/target/ThreadLocalTargetSourceTests-context.xml
+++ b/spring-aop/src/test/resources/org/springframework/aop/target/ThreadLocalTargetSourceTests-context.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
+<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "https://www.springframework.org/dtd/spring-beans-2.0.dtd">
 
 <beans>
 
diff --git a/spring-context/src/test/resources/org/springframework/aop/target/CommonsPool2TargetSourceTests-context.xml b/spring-context/src/test/resources/org/springframework/aop/target/CommonsPool2TargetSourceTests-context.xml
index 152d52ce25..989b1b11a9 100644
--- a/spring-context/src/test/resources/org/springframework/aop/target/CommonsPool2TargetSourceTests-context.xml
+++ b/spring-context/src/test/resources/org/springframework/aop/target/CommonsPool2TargetSourceTests-context.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
+<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "https://www.springframework.org/dtd/spring-beans-2.0.dtd">
 
 <beans>
 
diff --git a/spring-web/src/test/java/org/springframework/http/converter/feed/RssChannelHttpMessageConverterTests.java b/spring-web/src/test/java/org/springframework/http/converter/feed/RssChannelHttpMessageConverterTests.java
index b379b048ef..aa674b4d80 100644
--- a/spring-web/src/test/java/org/springframework/http/converter/feed/RssChannelHttpMessageConverterTests.java
+++ b/spring-web/src/test/java/org/springframework/http/converter/feed/RssChannelHttpMessageConverterTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/spring-webmvc/src/test/java/org/springframework/web/servlet/config/MvcNamespaceTests.java b/spring-webmvc/src/test/java/org/springframework/web/servlet/config/MvcNamespaceTests.java
index adb003d1cb..a09b1e251b 100644
--- a/spring-webmvc/src/test/java/org/springframework/web/servlet/config/MvcNamespaceTests.java
+++ b/spring-webmvc/src/test/java/org/springframework/web/servlet/config/MvcNamespaceTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/spring-websocket/src/test/java/org/springframework/web/socket/config/HandlersBeanDefinitionParserTests.java b/spring-websocket/src/test/java/org/springframework/web/socket/config/HandlersBeanDefinitionParserTests.java
index 23d1c631f0..068cd835e9 100644
--- a/spring-websocket/src/test/java/org/springframework/web/socket/config/HandlersBeanDefinitionParserTests.java
+++ b/spring-websocket/src/test/java/org/springframework/web/socket/config/HandlersBeanDefinitionParserTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/src/docs/asciidoc/images/ejb.svg b/src/docs/asciidoc/images/ejb.svg
index d8b275784a..d7aa88684f 100644
--- a/src/docs/asciidoc/images/ejb.svg
+++ b/src/docs/asciidoc/images/ejb.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "https://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
 <!-- Generated by Microsoft Visio 11.0, SVG Export, v1.0 ejb.svg Page-1 -->
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:v="http://schemas.microsoft.com/visio/2003/SVGExtensions/" width="4.25667in"
 		height="2.64in" viewBox="0 0 306.48 190.08" xml:space="preserve" color-interpolation-filters="sRGB" class="st9">
diff --git a/src/docs/asciidoc/images/full.svg b/src/docs/asciidoc/images/full.svg
index 44b4c76758..3c3077c7ef 100644
--- a/src/docs/asciidoc/images/full.svg
+++ b/src/docs/asciidoc/images/full.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "https://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
 <!-- Generated by Microsoft Visio 11.0, SVG Export, v1.0 full.svg Page-1 -->
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:v="http://schemas.microsoft.com/visio/2003/SVGExtensions/" width="4.97167in"
 		height="3.59998in" viewBox="0 0 357.96 259.199" xml:space="preserve" color-interpolation-filters="sRGB" class="st9">
diff --git a/src/docs/asciidoc/images/mvc-context-hierarchy.svg b/src/docs/asciidoc/images/mvc-context-hierarchy.svg
index 52532ec255..07148744b5 100644
--- a/src/docs/asciidoc/images/mvc-context-hierarchy.svg
+++ b/src/docs/asciidoc/images/mvc-context-hierarchy.svg
@@ -25,7 +25,7 @@
    inkscape:export-ydpi="90"><metadata
      id="metadata5713"><rdf:RDF><cc:Work
          rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" /><dc:title></dc:title></cc:Work></rdf:RDF></metadata><defs
+           rdf:resource="https://purl.org/dc/dcmitype/StillImage" /><dc:title></dc:title></cc:Work></rdf:RDF></metadata><defs
      id="defs5711"><marker
        inkscape:isstock="true"
        style="overflow:visible;"
diff --git a/src/docs/asciidoc/images/mvc-root-context.svg b/src/docs/asciidoc/images/mvc-root-context.svg
index c29b270bc7..bd4c745afb 100644
--- a/src/docs/asciidoc/images/mvc-root-context.svg
+++ b/src/docs/asciidoc/images/mvc-root-context.svg
@@ -25,7 +25,7 @@
    inkscape:export-ydpi="90"><metadata
      id="metadata5713"><rdf:RDF><cc:Work
          rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" /><dc:title /></cc:Work></rdf:RDF></metadata><defs
+           rdf:resource="https://purl.org/dc/dcmitype/StillImage" /><dc:title /></cc:Work></rdf:RDF></metadata><defs
      id="defs5711"><marker
        inkscape:stockid="Arrow1Mend"
        orient="auto"
diff --git a/src/docs/asciidoc/images/remoting.svg b/src/docs/asciidoc/images/remoting.svg
index 9b45245bdf..e8a35d78cf 100644
--- a/src/docs/asciidoc/images/remoting.svg
+++ b/src/docs/asciidoc/images/remoting.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "https://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
 <!-- Generated by Microsoft Visio 11.0, SVG Export, v1.0 remoting.svg Page-1 -->
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:v="http://schemas.microsoft.com/visio/2003/SVGExtensions/" width="4.70667in"
 		height="2.65333in" viewBox="0 0 338.88 191.04" xml:space="preserve" color-interpolation-filters="sRGB" class="st9">
diff --git a/src/docs/asciidoc/images/spring-overview.svg b/src/docs/asciidoc/images/spring-overview.svg
index f1b6c71486..a852496816 100644
--- a/src/docs/asciidoc/images/spring-overview.svg
+++ b/src/docs/asciidoc/images/spring-overview.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "https://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
 <!-- Generated by Microsoft Visio 11.0, SVG Export, v1.0 spring-overview.svg Page-1 -->
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:v="http://schemas.microsoft.com/visio/2003/SVGExtensions/" width="8.26772in"
 		height="11.6929in" viewBox="0 0 595.276 841.89" xml:space="preserve" color-interpolation-filters="sRGB" class="st5">
diff --git a/src/docs/asciidoc/images/thirdparty-web.svg b/src/docs/asciidoc/images/thirdparty-web.svg
index a3966dbefb..494cfb9106 100644
--- a/src/docs/asciidoc/images/thirdparty-web.svg
+++ b/src/docs/asciidoc/images/thirdparty-web.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "https://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
 <!-- Generated by Microsoft Visio 11.0, SVG Export, v1.0 thirdparty-web.svg Page-1 -->
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:v="http://schemas.microsoft.com/visio/2003/SVGExtensions/" width="4.90667in"
 		height="3.29238in" viewBox="0 0 353.28 237.051" xml:space="preserve" color-interpolation-filters="sRGB" class="st9">