diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index f727cb286..6a2dadec9 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -28,6 +28,6 @@ jobs:
         uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: 'adopt'
-          java-version: '11'
+          java-version: '17'
       - name: Check
         run: ./gradlew test :hivemq-edge:forbiddenApis :hivemqEdgeZip
diff --git a/.github/workflows/etherip-package.yml b/.github/workflows/etherip-package.yml
index a28d37b54..ee85c736c 100644
--- a/.github/workflows/etherip-package.yml
+++ b/.github/workflows/etherip-package.yml
@@ -21,7 +21,7 @@ jobs:
         uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
         with:
           distribution: 'adopt'
-          java-version: '11'
+          java-version: '17'
       - uses: whelk-io/maven-settings-xml-action@9dc09b23833fa9aa7f27b63db287951856f3433d # v3.0.0
         with:
           servers: >
diff --git a/edge-plugins/build.gradle.kts b/edge-plugins/build.gradle.kts
index c161082c5..03a248ffc 100644
--- a/edge-plugins/build.gradle.kts
+++ b/edge-plugins/build.gradle.kts
@@ -6,7 +6,7 @@ group = "com.hivemq"
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(11))
+        languageVersion.set(JavaLanguageVersion.of(17))
     }
 }
 
diff --git a/hivemq-edge/build.gradle.kts b/hivemq-edge/build.gradle.kts
index b79969925..94c6a4fd4 100644
--- a/hivemq-edge/build.gradle.kts
+++ b/hivemq-edge/build.gradle.kts
@@ -95,7 +95,7 @@ metadata {
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(11))
+        languageVersion.set(JavaLanguageVersion.of(17))
     }
     withJavadocJar()
     withSourcesJar()
@@ -253,6 +253,8 @@ tasks.test {
         "--add-opens",
         "java.base/sun.nio.ch=ALL-UNNAMED",
         "--add-opens",
+        "java.base/java.util=ALL-UNNAMED",
+        "--add-opens",
         "jdk.management/com.sun.management.internal=ALL-UNNAMED",
         "--add-exports",
         "java.base/jdk.internal.misc=ALL-UNNAMED"
diff --git a/modules/hivemq-edge-module-etherip/build.gradle.kts b/modules/hivemq-edge-module-etherip/build.gradle.kts
index 57695d8d5..60500f1ba 100644
--- a/modules/hivemq-edge-module-etherip/build.gradle.kts
+++ b/modules/hivemq-edge-module-etherip/build.gradle.kts
@@ -16,7 +16,7 @@ group = "com.hivemq"
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(11))
+        languageVersion.set(JavaLanguageVersion.of(17))
     }
 }
 
diff --git a/modules/hivemq-edge-module-file/build.gradle.kts b/modules/hivemq-edge-module-file/build.gradle.kts
index 33c9912e0..f5d2fe6f9 100644
--- a/modules/hivemq-edge-module-file/build.gradle.kts
+++ b/modules/hivemq-edge-module-file/build.gradle.kts
@@ -15,7 +15,7 @@ group = "com.hivemq"
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(11))
+        languageVersion.set(JavaLanguageVersion.of(17))
     }
 }
 
diff --git a/modules/hivemq-edge-module-http/build.gradle.kts b/modules/hivemq-edge-module-http/build.gradle.kts
index 4044d87e9..3564bdbf2 100644
--- a/modules/hivemq-edge-module-http/build.gradle.kts
+++ b/modules/hivemq-edge-module-http/build.gradle.kts
@@ -15,7 +15,7 @@ group = "com.hivemq"
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(11))
+        languageVersion.set(JavaLanguageVersion.of(17))
     }
 }
 
diff --git a/modules/hivemq-edge-module-modbus/build.gradle.kts b/modules/hivemq-edge-module-modbus/build.gradle.kts
index a5b1cc221..f673dfc07 100644
--- a/modules/hivemq-edge-module-modbus/build.gradle.kts
+++ b/modules/hivemq-edge-module-modbus/build.gradle.kts
@@ -15,7 +15,7 @@ group = "com.hivemq"
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(11))
+        languageVersion.set(JavaLanguageVersion.of(17))
     }
 }
 
diff --git a/modules/hivemq-edge-module-opcua/build.gradle.kts b/modules/hivemq-edge-module-opcua/build.gradle.kts
index 154071421..adeb768ae 100644
--- a/modules/hivemq-edge-module-opcua/build.gradle.kts
+++ b/modules/hivemq-edge-module-opcua/build.gradle.kts
@@ -15,7 +15,7 @@ group = "com.hivemq"
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(11))
+        languageVersion.set(JavaLanguageVersion.of(17))
     }
 }
 
diff --git a/modules/hivemq-edge-module-plc4x/build.gradle.kts b/modules/hivemq-edge-module-plc4x/build.gradle.kts
index 15a8cabfc..da44f6d6f 100644
--- a/modules/hivemq-edge-module-plc4x/build.gradle.kts
+++ b/modules/hivemq-edge-module-plc4x/build.gradle.kts
@@ -16,7 +16,7 @@ group = "com.hivemq"
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(11))
+        languageVersion.set(JavaLanguageVersion.of(17))
     }
 }