diff --git a/.github/workflows/build-maven.yml b/.github/workflows/build-maven.yml
index fd1129e..0da4ffc 100644
--- a/.github/workflows/build-maven.yml
+++ b/.github/workflows/build-maven.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ 8, 11, 14 ]
+        java: [ 8, 11, 15 ]
     steps:
       - uses: kamiazya/setup-graphviz@v1
       - uses: actions/checkout@v2
diff --git a/pom.xml b/pom.xml
index dab7ce5..176491f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -19,7 +19,7 @@
         <java.version>1.8</java.version>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
-        <tiles-maven-plugin.version>2.17</tiles-maven-plugin.version>
+        <tiles-maven-plugin.version>2.18</tiles-maven-plugin.version>
         <kemitix-maven-tiles.version>2.4.1</kemitix-maven-tiles.version>
         <kemitix-checkstyle.version>5.4.0</kemitix-checkstyle.version>
         <list-head-tail.version>1.0.0</list-head-tail.version>