diff --git a/spring-boot-project/spring-boot-docs/pom.xml b/spring-boot-project/spring-boot-docs/pom.xml
index 4fe3be1178..b280fcb8ea 100644
--- a/spring-boot-project/spring-boot-docs/pom.xml
+++ b/spring-boot-project/spring-boot-docs/pom.xml
@@ -1476,8 +1476,8 @@
 								<configuration>
 									<backend>html5</backend>
 									<sourceDocumentExtensions>
-										<sourceDocumentExtension>adoc</sourceDocumentExtension>
-										<sourceDocumentExtension>htmladoc</sourceDocumentExtension>
+										<sourceDocumentExtension>.adoc</sourceDocumentExtension>
+										<sourceDocumentExtension>.htmladoc</sourceDocumentExtension>
 									</sourceDocumentExtensions>
 									<outputDirectory>${project.build.directory}/generated-docs/reference/html</outputDirectory>
 									<sourceHighlighter>highlight.js</sourceHighlighter>
@@ -1509,7 +1509,7 @@
 								<configuration>
 									<backend>html5</backend>
 									<sourceDocumentExtensions>
-										<sourceDocumentExtension>htmlsingleadoc</sourceDocumentExtension>
+										<sourceDocumentExtension>.htmlsingleadoc</sourceDocumentExtension>
 									</sourceDocumentExtensions>
 									<outputDirectory>${project.build.directory}/generated-docs/reference/htmlsingle</outputDirectory>
 									<sourceHighlighter>highlight.js</sourceHighlighter>