diff --git a/gradle/docs.gradle b/gradle/docs.gradle
index 78433d7679..43fdc6249a 100644
--- a/gradle/docs.gradle
+++ b/gradle/docs.gradle
@@ -84,6 +84,8 @@ task downloadResources(type: Download) {
 	src "https://repo.spring.io/release/io/spring/docresources/" +
 			"spring-doc-resources/$version/spring-doc-resources-${version}.zip"
 	dest project.file("$buildDir/docs/spring-doc-resources.zip")
+	onlyIfModified true
+	useETag "all"
 }
 
 task extractDocResources(type: Copy, dependsOn: downloadResources) {