diff --git a/.github/workflows/basic-checks.yml b/.github/workflows/basic-checks.yml
index 698c4dc36f..cdf98a6c8e 100644
--- a/.github/workflows/basic-checks.yml
+++ b/.github/workflows/basic-checks.yml
@@ -3,7 +3,7 @@ name: Basic checks
 on: [pull_request]
 
 env:
-  JAVA_VERSION: 19
+  JAVA_VERSION: 20
 
 jobs:
   spotless:
diff --git a/.github/workflows/code-analysis.yml b/.github/workflows/code-analysis.yml
index 94cbba8bf6..1ce3bf532f 100644
--- a/.github/workflows/code-analysis.yml
+++ b/.github/workflows/code-analysis.yml
@@ -8,7 +8,7 @@ on:
     - cron: '0 20 * * 4'
 
 env:
-  JAVA_VERSION: 19
+  JAVA_VERSION: 20
 
 jobs:
   sonar:
diff --git a/.github/workflows/docker-publish.yaml b/.github/workflows/docker-publish.yaml
index bc787405d2..b26aee1440 100644
--- a/.github/workflows/docker-publish.yaml
+++ b/.github/workflows/docker-publish.yaml
@@ -7,7 +7,7 @@ on:
       - 'master'
 
 env:
-  JAVA_VERSION: 19
+  JAVA_VERSION: 20
 
 jobs:
   docker:
diff --git a/.github/workflows/docker-verify.yaml b/.github/workflows/docker-verify.yaml
index 1c96145eb4..71a3427241 100644
--- a/.github/workflows/docker-verify.yaml
+++ b/.github/workflows/docker-verify.yaml
@@ -3,7 +3,7 @@ name: Docker Verify
 on: [pull_request]
 
 env:
-  JAVA_VERSION: 19
+  JAVA_VERSION: 20
 
 jobs:
   docker:
diff --git a/.github/workflows/releases.yaml b/.github/workflows/releases.yaml
index dcda2557f7..a2c5427348 100644
--- a/.github/workflows/releases.yaml
+++ b/.github/workflows/releases.yaml
@@ -10,7 +10,7 @@ defaults:
     shell: bash
 
 env:
-  JAVA_VERSION: 19
+  JAVA_VERSION: 20
 
 jobs:
 
diff --git a/README.md b/README.md
index 93c2f14826..467bc3f036 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # TJ-Bot
 
 [![codefactor](https://img.shields.io/codefactor/grade/github/together-java/tj-bot)](https://www.codefactor.io/repository/github/together-java/tj-bot)
-![Java](https://img.shields.io/badge/Java-19-ff696c)
+![Java](https://img.shields.io/badge/Java-20-ff696c)
 [![license](https://img.shields.io/github/license/Together-Java/TJ-Bot)](https://github.com/Together-Java/TJ-Bot/blob/master/LICENSE)
 ![GitHub release (latest by date)](https://img.shields.io/github/v/release/Together-Java/TJ-Bot?label=release)
 
diff --git a/application/build.gradle b/application/build.gradle
index 016e02a28b..4452984d89 100644
--- a/application/build.gradle
+++ b/application/build.gradle
@@ -18,7 +18,7 @@ repositories {
 var outputImage = 'togetherjava.org:5001/togetherjava/tjbot:' + System.getenv('BRANCH_NAME') ?: 'latest'
 
 jib {
-    from.image = 'eclipse-temurin:19'
+    from.image = 'eclipse-temurin:20'
     to {
         image = outputImage
         auth {
diff --git a/build.gradle b/build.gradle
index 1e648c367b..7867a725ff 100644
--- a/build.gradle
+++ b/build.gradle
@@ -65,8 +65,8 @@ subprojects {
         options.encoding = 'UTF-8'
 
         // Nails the Java-Version of every Subproject
-        sourceCompatibility = JavaVersion.VERSION_19
-        targetCompatibility = JavaVersion.VERSION_19
+        sourceCompatibility = JavaVersion.VERSION_20
+        targetCompatibility = JavaVersion.VERSION_20
     }
 
     compileJava(compileTasks)
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index ccebba7710..7f93135c49 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index fc10b601f7..ac72c34e8a 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
 networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index 79a61d421c..0adc8e1a53 100755
--- a/gradlew
+++ b/gradlew
@@ -83,10 +83,8 @@ done
 # This is normally unused
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -133,10 +131,13 @@ location of your Java installation."
     fi
 else
     JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
+    fi
 fi
 
 # Increase the maximum file descriptors if we can.
@@ -197,6 +198,10 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
 # Collect all arguments for the java command;
 #   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
 #     shell script including quotes and variable substitutions, so put them in