diff --git a/modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-boot/pom-sb3.mustache b/modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-boot/pom-sb3.mustache
index 8d297379924..52d1067c6ef 100644
--- a/modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-boot/pom-sb3.mustache
+++ b/modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-boot/pom-sb3.mustache
@@ -42,7 +42,7 @@
         <repository>
             <id>repository.spring.milestone</id>
             <name>Spring Milestone Repository</name>
-            <url>http://repo.spring.io/milestone</url>
+            <url>https://repo.spring.io/milestone</url>
         </repository>
     </repositories>
 
@@ -53,6 +53,8 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
+                <!-- the maven plugin doesn't necessarily match the parent if using a milestone release. -->
+                <version>2.7.0</version>
                 {{#classifier}}
                 <configuration>
                   <classifier>{{{classifier}}}</classifier>
diff --git a/modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-cloud/pom-sb3.mustache b/modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-cloud/pom-sb3.mustache
index 1d35db88d8a..18a58ba9ad5 100644
--- a/modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-cloud/pom-sb3.mustache
+++ b/modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-cloud/pom-sb3.mustache
@@ -39,7 +39,7 @@
         <repository>
             <id>repository.spring.milestone</id>
             <name>Spring Milestone Repository</name>
-            <url>http://repo.spring.io/milestone</url>
+            <url>https://repo.spring.io/milestone</url>
         </repository>
     </repositories>
 
diff --git a/samples/openapi3/client/petstore/spring-cloud-3/pom.xml b/samples/openapi3/client/petstore/spring-cloud-3/pom.xml
index 921000f10fa..f5ad2f64698 100644
--- a/samples/openapi3/client/petstore/spring-cloud-3/pom.xml
+++ b/samples/openapi3/client/petstore/spring-cloud-3/pom.xml
@@ -23,7 +23,7 @@
         <repository>
             <id>repository.spring.milestone</id>
             <name>Spring Milestone Repository</name>
-            <url>http://repo.spring.io/milestone</url>
+            <url>https://repo.spring.io/milestone</url>
         </repository>
     </repositories>
 
diff --git a/samples/openapi3/server/petstore/springboot-3/pom.xml b/samples/openapi3/server/petstore/springboot-3/pom.xml
index 09dcd5a651e..d5e81b95274 100644
--- a/samples/openapi3/server/petstore/springboot-3/pom.xml
+++ b/samples/openapi3/server/petstore/springboot-3/pom.xml
@@ -24,7 +24,7 @@
         <repository>
             <id>repository.spring.milestone</id>
             <name>Spring Milestone Repository</name>
-            <url>http://repo.spring.io/milestone</url>
+            <url>https://repo.spring.io/milestone</url>
         </repository>
     </repositories>
 
@@ -34,6 +34,8 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
+                <!-- the maven plugin doesn't necessarily match the parent if using a milestone release. -->
+                <version>2.7.0</version>
             </plugin>
         </plugins>
     </build>