diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d3212f26..7c0b6893 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,7 +50,8 @@ jobs:
         java: [ 21, 23 ]
         # OSS support versions
         # https://spring.io/projects/spring-boot#support
-        spring-boot-version: [ 3.3.7, 3.4.1 ]
+        # and milestone version of the next release
+        spring-boot-version: [ 3.4.3, 3.5.0-M2 ]
 
     steps:
       - uses: actions/checkout@v4
diff --git a/pom.xml b/pom.xml
index 6de61abf..7143ed77 100644
--- a/pom.xml
+++ b/pom.xml
@@ -48,7 +48,7 @@
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>
         <doma.version>3.6.0</doma.version>
-        <spring-boot.version>3.2.9</spring-boot.version>
+        <spring-boot.version>3.3.9</spring-boot.version>
         <source-plugin.version>3.3.1</source-plugin.version>
         <javadoc-plugin.version>3.11.2</javadoc-plugin.version>
         <nexus-staging-plugin.version>1.7.0</nexus-staging-plugin.version>
@@ -234,4 +234,4 @@
             </snapshots>
         </repository>
     </repositories>
-</project>
\ No newline at end of file
+</project>