diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 694725891..7355e6dc2 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -37,10 +37,10 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4
 
-    - name: Set up JDK 8
+    - name: Set up JDK 11
       uses: actions/setup-java@v4
       with:
-        java-version: '8'
+        java-version: '11'
         distribution: 'temurin'
 
     # Initializes the CodeQL tools for scanning.
diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index abfbee5a3..fa86f6225 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -16,14 +16,14 @@ jobs:
 
     strategy:
       matrix:
-        java: [ '8', '11', '17', '21']
+        java: [ '11', '17', '21', '23']
 
     steps:
     - uses: actions/checkout@v4
 
     - name: Verify gradle wrapper
       uses: gradle/actions/wrapper-validation@v4
-      if: matrix.java == '8'
+      if: matrix.java == '11'
 
     - name: Set up JDK ${{ matrix.java }}
       uses: actions/setup-java@v4
diff --git a/RSyntaxTextArea/build.gradle b/RSyntaxTextArea/build.gradle
index 10a942ffc..dc9e43026 100755
--- a/RSyntaxTextArea/build.gradle
+++ b/RSyntaxTextArea/build.gradle
@@ -1,10 +1,7 @@
-import static org.gradle.api.JavaVersion.*
-
 ['base', 'jacoco', 'biz.aQute.bnd.builder', 'distribution', 'maven-publish', 'signing'].each { apply plugin: it }
 
-// We require building with JDK 8 or later.  We turn off doclint since our
-// generated *TokenMakers have horrible documentation (see https://github.com/jflex-de/jflex/issues/182)
-assert current().isJava8Compatible()
+// Turn off doclint since our generated *TokenMakers have horrible
+// documentation (see https://github.com/jflex-de/jflex/issues/182)
 allprojects {
 	tasks.withType(Javadoc) {
 		options.addStringOption('Xdoclint:none', '-quiet')
@@ -36,7 +33,7 @@ jar {
                 'Implementation-Version': version,
                 'Bundle-License': 'BSD-3-Clause',
                 // Not sure why Require-Capability is not being added by the osgi plugin...
-                'Require-Capability': 'osgi.ee;filter:="(&(osgi.ee=JavaSE)(version=' + javaVersion + '))"')
+                'Require-Capability': 'osgi.ee;filter:="(&(osgi.ee=JavaSE)(version=1.' + osgiRequiredCompatibility + '))"')
     }
 }
 test {
diff --git a/build.gradle b/build.gradle
index 941fc1a46..210e787f4 100755
--- a/build.gradle
+++ b/build.gradle
@@ -11,8 +11,12 @@ plugins {
     id 'com.github.spotbugs' version '5.2.5'
 }
 
+// We require building with JDK 11 or later. Built artifact compatibility
+// is controlled by javaLanguageVersion
+assert JavaVersion.current().isJava11Compatible()
+
 group 'com.fifesoft'
-// NOTE: Local Java 8:  /Library/Java/JavaVirtualMachines/jdk1.8.0_191.jdk/Contents/Home
+// NOTE: Local Java 11:  /Library/Java/JavaVirtualMachines/jdk-11.0.25+9/Contents/Home
 
 allprojects {
 
@@ -24,7 +28,7 @@ allprojects {
     }
 
     wrapper {
-        gradleVersion = '8.10.2'
+        gradleVersion = '8.11.1'
     }
 }
 
@@ -81,8 +85,7 @@ subprojects {
     }
 
     compileJava {
-        sourceCompatibility javaVersion.toString()
-        targetCompatibility javaVersion.toString()
+        options.release = Integer.parseInt(javaLanguageVersion)
         options.debug = true
         options.debugOptions.debugLevel = 'source,vars,lines'
         options.compilerArgs << '-Xlint:deprecation' << '-Xlint:unchecked'
diff --git a/gradle.properties b/gradle.properties
index 62c1a58ea..c6edd3bdd 100755
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,6 @@
 # Note that Maven- and signing-related properties are in <maven-home>/gradle.properties
-javaVersion=1.8
+javaLanguageVersion=8
+osgiRequiredCompatibility=1.8
 version=3.5.3-SNAPSHOT
 
 # Ugh, see https://github.com/gradle/gradle/issues/11308
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index df97d72b8..e2847c820 100755
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME