diff --git a/.config/checkstyle/checkstyle.xml b/.config/checkstyle/checkstyle.xml
index b455e7a..6e193ba 100644
--- a/.config/checkstyle/checkstyle.xml
+++ b/.config/checkstyle/checkstyle.xml
@@ -65,6 +65,7 @@
 		<module name="ExplicitInitialization">
 			<property name="severity" value="info"/>
 		</module>
+		<module name="ExpressionOverBlockLambda"/>
 		<module name="FinalClass"/>
 		<module name="FinalParameters"/>
 		<module name="GenericWhitespace"/>
@@ -144,6 +145,7 @@
 		<module name="UnnecessarySemicolonInTryWithResources"/>
 		<module name="UnusedImports"/>
 		<module name="UnusedLocalVariable"/>
+		<module name="UnusedPrivateField"/>
 		<!-- Disabled by default; should be enabled on Java 25+ -->
 		<!-- <module name="UnusedTryResourceShouldBeUnnamed"/> -->
 		<module name="UpperEll"/>
diff --git a/.config/pmd/java/ruleset.xml b/.config/pmd/java/ruleset.xml
index 8dde42b..4c72bf2 100644
--- a/.config/pmd/java/ruleset.xml
+++ b/.config/pmd/java/ruleset.xml
@@ -169,7 +169,7 @@
 	<rule ref="category/java/errorprone.xml/UnconditionalIfStatement"/>
 	<rule ref="category/java/errorprone.xml/UnnecessaryCaseChange"/>
 	<rule ref="category/java/errorprone.xml/UnsupportedJdkApiUsage"/>
-	<rule ref="category/java/errorprone.xml/UselessPureMethodCall"/>
+	<rule ref="category/java/errorprone.xml/UnusedReturnValue"/>
 
 
 	<rule ref="category/java/multithreading.xml">
diff --git a/.github/workflows/check-build.yml b/.github/workflows/check-build.yml
index 1b30a97..f63ba1d 100644
--- a/.github/workflows/check-build.yml
+++ b/.github/workflows/check-build.yml
@@ -31,7 +31,7 @@ jobs:
     - uses: actions/checkout@v7
 
     - name: Set up JDK
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@v6
       with:
         distribution: ${{ matrix.distribution }}
         java-version: ${{ matrix.java }}
@@ -93,7 +93,7 @@ jobs:
     - uses: actions/checkout@v7
 
     - name: Set up JDK
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@v6
       with:
         distribution: ${{ matrix.distribution }}
         java-version: ${{ matrix.java }}
@@ -109,7 +109,7 @@ jobs:
           ${{ runner.os }}-gradle-checkstyle-
 
     - name: Run Checkstyle
-      run: ./gradlew checkstyleMain checkstyleTest -PcheckstyleEnabled --stacktrace
+      run: ./gradlew checkstyleMain checkstyleTest -PcheckstyleEnabled --stacktrace -x compileJava -x compileTestJava -x classes -x testClasses
 
   pmd:
     runs-on: ubuntu-latest
@@ -123,7 +123,7 @@ jobs:
     - uses: actions/checkout@v7
 
     - name: Set up JDK
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@v6
       with:
         distribution: ${{ matrix.distribution }}
         java-version: ${{ matrix.java }}
diff --git a/.github/workflows/check-ide-compatibility.yml b/.github/workflows/check-ide-compatibility.yml
index be952a9..455d578 100644
--- a/.github/workflows/check-ide-compatibility.yml
+++ b/.github/workflows/check-ide-compatibility.yml
@@ -47,7 +47,7 @@ jobs:
     - uses: actions/checkout@v7
 
     - name: Set up JDK
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@v6
       with:
         distribution: 'temurin'
         java-version: 25
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index c785dbf..1e0c678 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -16,7 +16,7 @@ jobs:
     - uses: actions/checkout@v7
 
     - name: Set up JDK
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@v6
       with:
         java-version: '25'
         distribution: 'temurin'
@@ -115,7 +115,7 @@ jobs:
     - uses: actions/checkout@v7
 
     - name: Set up JDK
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@v6
       with:
         distribution: 'temurin'
         java-version: 25
diff --git a/.github/workflows/test-deploy.yml b/.github/workflows/test-deploy.yml
index a69f9f9..62d2b64 100644
--- a/.github/workflows/test-deploy.yml
+++ b/.github/workflows/test-deploy.yml
@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v7
 
       - name: Set up JDK
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@v6
         with:
           distribution: 'temurin'
           java-version: 25
diff --git a/build.gradle b/build.gradle
index d6c5208..fefe6b3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,9 +7,9 @@ plugins {
 }
 
 ext {
-    checkstyleVersion = '13.11.0'
+    checkstyleVersion = '14.1.0'
 
-    pmdVersion = '7.26.0'
+    pmdVersion = '7.27.0'
 }
 
 def properties(String key) {
@@ -48,12 +48,18 @@ import org.jetbrains.intellij.platform.gradle.IntelliJPlatformType
 
 // Add dependencies to test, junit5 api (annotations) and engine (runtime)
 dependencies {
-    intellijPlatform {
-        create(properties("platformType"), properties("platformVersion"))
-        bundledPlugins(properties("platformBundledPlugins").map { it.split(",").collect { it.trim() }.findAll { !it.empty } })
-        plugins(properties("platformPlugins").map { it.split(",").collect { it.trim() }.findAll { !it.empty } })
-        pluginVerifier()
-        zipSigner()
+    // Downloading 3GB of IntelliJ is not needed for CheckStyle
+    if (!project.hasProperty("checkstyleEnabled")) {
+        intellijPlatform {
+            create(properties("platformType"), properties("platformVersion")) {
+                // PMD 7.27: This will otherwise crash because PMD assumes all files are ZIP files
+                useInstaller = !project.hasProperty("pmdEnabled")
+            }
+            bundledPlugins(properties("platformBundledPlugins").map { it.split(",").collect { it.trim() }.findAll { !it.empty } })
+            plugins(properties("platformPlugins").map { it.split(",").collect { it.trim() }.findAll { !it.empty } })
+            pluginVerifier()
+            zipSigner()
+        }
     }
     checkstyle "com.puppycrawl.tools:checkstyle:${checkstyleVersion}"
     pmd "net.sourceforge.pmd:pmd-ant:${pmdVersion}",
diff --git a/gradle.properties b/gradle.properties
index 19652d9..d2aab16 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -5,7 +5,7 @@ pluginName=
 pluginVersion=
 # IntelliJ Platform Properties -> https://plugins.jetbrains.com/docs/intellij/tools-gradle-intellij-plugin.html#configuration-intellij-extension
 platformType=IU
-platformVersion=2026.2.0.1
+platformVersion=2026.2.1
 platformSinceBuild=261
 # Plugin Dependencies -> https://plugins.jetbrains.com/docs/intellij/plugin-dependencies.html
 # Example: platformBundledPlugins = com.intellij.java, com.jetbrains.php:203.4449.22