diff --git a/build.gradle b/build.gradle
index 96d0715f69cc1ef175a81896420b7141e9eadee3..e417afade83fda40c32a0bf273f20492f9fc5b58 100644
--- a/build.gradle
+++ b/build.gradle
@@ -175,22 +175,22 @@ configure(allprojects) { project ->
 	}
 
 	ext.javadocLinks = [
-		"http://docs.oracle.com/javase/8/docs/api/",
-		"http://docs.oracle.com/javaee/7/api/",
-		"http://docs.oracle.com/cd/E13222_01/wls/docs90/javadocs/",  // CommonJ
-		"http://pic.dhe.ibm.com/infocenter/wasinfo/v7r0/topic/com.ibm.websphere.javadoc.doc/web/apidocs/",
-		"http://glassfish.java.net/nonav/docs/v3/api/",
-		"http://docs.jboss.org/jbossas/javadoc/4.0.5/connector/",
-		"http://docs.jboss.org/jbossas/javadoc/7.1.2.Final/",
-		"http://tiles.apache.org/tiles-request/apidocs/",
-		"http://tiles.apache.org/framework/apidocs/",
-		"http://www.eclipse.org/aspectj/doc/released/aspectj5rt-api/",
-		"http://ehcache.org/apidocs/2.10.4",
-		"http://quartz-scheduler.org/api/2.2.1/",
-		"http://fasterxml.github.io/jackson-core/javadoc/2.9/",
-		"http://fasterxml.github.io/jackson-databind/javadoc/2.9/",
-		"http://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.9/",
-		"http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/",
+		"https://docs.oracle.com/javase/8/docs/api/",
+		"https://docs.oracle.com/javaee/7/api/",
+		"https://docs.oracle.com/cd/E13222_01/wls/docs90/javadocs/",  // CommonJ
+		"https://pic.dhe.ibm.com/infocenter/wasinfo/v7r0/topic/com.ibm.websphere.javadoc.doc/web/apidocs/",
+		"https://glassfish.java.net/nonav/docs/v3/api/",
+		"https://docs.jboss.org/jbossas/javadoc/4.0.5/connector/",
+		"https://docs.jboss.org/jbossas/javadoc/7.1.2.Final/",
+		"https://tiles.apache.org/tiles-request/apidocs/",
+		"https://tiles.apache.org/framework/apidocs/",
+		"https://www.eclipse.org/aspectj/doc/released/aspectj5rt-api/",
+		"https://www.ehcache.org/apidocs/2.10.4",
+		"https://www.quartz-scheduler.org/api/2.2.1/",
+		"https://fasterxml.github.io/jackson-core/javadoc/2.9/",
+		"https://fasterxml.github.io/jackson-databind/javadoc/2.9/",
+		"https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.9/",
+		"https://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/",
 		"https://junit.org/junit4/javadoc/4.12/",
 		"https://junit.org/junit5/docs/${junit5Version}/api/"
 	] as String[]
diff --git a/gradle/docs.gradle b/gradle/docs.gradle
index 8102dfb5509e42a016572b2d105d69687dac4d16..3e67b9093d403610444bade06420ed8474dd6fcf 100644
--- a/gradle/docs.gradle
+++ b/gradle/docs.gradle
@@ -5,7 +5,7 @@
  *  you may not use this file except in compliance with the License.
  *  You may obtain a copy of the License at
  *
- *       http://www.apache.org/licenses/LICENSE-2.0
+ *       https://www.apache.org/licenses/LICENSE-2.0
  *
  *  Unless required by applicable law or agreed to in writing, software
  *  distributed under the License is distributed on an "AS IS" BASIS,
@@ -72,10 +72,10 @@ dokka {
 		packageListUrl = new File(buildDir, "api/package-list").toURI().toURL()
 	}
 	externalDocumentationLink {
-		url = new URL("http://projectreactor.io/docs/core/release/api/")
+		url = new URL("https://projectreactor.io/docs/core/release/api/")
 	}
 	externalDocumentationLink {
-		url = new URL("http://www.reactive-streams.org/reactive-streams-1.0.1-javadoc/")
+		url = new URL("https://www.reactive-streams.org/reactive-streams-1.0.1-javadoc/")
 	}
 }
 
@@ -114,7 +114,7 @@ task docsZip(type: Zip, dependsOn: ['api', 'asciidoctor', 'dokka']) {
 	baseName = "spring-framework"
 	classifier = "docs"
 	description = "Builds -${classifier} archive containing api and reference " +
-			"for deployment at http://docs.spring.io/spring-framework/docs."
+			"for deployment at https://docs.spring.io/spring-framework/docs."
 
 	from("src/dist") {
 		include "changelog.txt"
@@ -142,7 +142,7 @@ task schemaZip(type: Zip) {
 	baseName = "spring-framework"
 	classifier = "schema"
 	description = "Builds -${classifier} archive containing all " +
-			"XSDs for deployment at http://springframework.org/schema."
+			"XSDs for deployment at https://springframework.org/schema."
 	duplicatesStrategy 'exclude'
 	moduleProjects.each { subproject ->
 		def Properties schemas = new Properties();
diff --git a/gradle/ide.gradle b/gradle/ide.gradle
index a643dbbb7f8f5584f4364ec8b21d91f07d11333c..85fe8b4cf7f0b1c6780b96efbb4ee456c5c45c13 100644
--- a/gradle/ide.gradle
+++ b/gradle/ide.gradle
@@ -11,7 +11,7 @@ eclipse.jdt {
 }
 
 // Replace classpath entries with project dependencies (GRADLE-1116)
-// http://issues.gradle.org/browse/GRADLE-1116
+// https://issues.gradle.org/browse/GRADLE-1116
 eclipse.classpath.file.whenMerged { classpath ->
 	def regexp = /.*?\/([^\/]+)\/build\/([^\/]+\/)+(?:main|test)/ // only match those that end in main or test (avoids removing necessary entries like build/classes/jaxb)
 	def projectOutputDependencies = classpath.entries.findAll { entry -> entry.path =~ regexp }
diff --git a/gradle/publish-maven.gradle b/gradle/publish-maven.gradle
index bbb6177e05ff750570876d045907fe1fa80d0b44..dad95c8452fce0ff28d17b76eac0195686a008a2 100644
--- a/gradle/publish-maven.gradle
+++ b/gradle/publish-maven.gradle
@@ -30,12 +30,12 @@ def customizePom(pom, gradleProject) {
 			url = "https://github.com/spring-projects/spring-framework"
 			organization {
 				name = "Spring IO"
-				url = "http://projects.spring.io/spring-framework"
+				url = "https://projects.spring.io/spring-framework"
 			}
 			licenses {
 				license {
 					name "Apache License, Version 2.0"
-					url "http://www.apache.org/licenses/LICENSE-2.0"
+					url "https://www.apache.org/licenses/LICENSE-2.0"
 					distribution "repo"
 				}
 			}