diff --git a/build-tools-internal/gradle/wrapper/gradle-wrapper.properties b/build-tools-internal/gradle/wrapper/gradle-wrapper.properties
index 01450089d2c6c..6bf62392cf2d0 100644
--- a/build-tools-internal/gradle/wrapper/gradle-wrapper.properties
+++ b/build-tools-internal/gradle/wrapper/gradle-wrapper.properties
@@ -1,7 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=f759b8dd5204e2e3fa4ca3e73f452f087153cf81bac9561eeb854229cc2c5365
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-all.zip
+distributionSha256Sum=b84e04fa845fecba48551f425957641074fcc00a88a84d2aae5808743b35fc85
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-all.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/release/ExtractCurrentVersionsTask.java b/build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/release/ExtractCurrentVersionsTask.java
index 76d6aeeca6db9..599a82295fe30 100644
--- a/build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/release/ExtractCurrentVersionsTask.java
+++ b/build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/release/ExtractCurrentVersionsTask.java
@@ -29,7 +29,7 @@
 
 import javax.inject.Inject;
 
-public class ExtractCurrentVersionsTask extends AbstractVersionsTask {
+public abstract class ExtractCurrentVersionsTask extends AbstractVersionsTask {
     private static final Logger LOGGER = Logging.getLogger(ExtractCurrentVersionsTask.class);
 
     private Path outputFile;
diff --git a/build-tools-internal/src/main/resources/minimumGradleVersion b/build-tools-internal/src/main/resources/minimumGradleVersion
index f7ee06693c17a..e977f5eae6fc9 100644
--- a/build-tools-internal/src/main/resources/minimumGradleVersion
+++ b/build-tools-internal/src/main/resources/minimumGradleVersion
@@ -1 +1 @@
-9.0.0
+9.1.0
\ No newline at end of file
diff --git a/gradle/verification-metadata.xml b/gradle/verification-metadata.xml
index 5ee90c1dc99ef..b89af420b8a96 100644
--- a/gradle/verification-metadata.xml
+++ b/gradle/verification-metadata.xml
@@ -4166,6 +4166,11 @@
             <sha256 value="e5894b710094b4caafc6280b8829a439fb764901ea0ae18d06ed80388b309b7a" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="org.junit.platform" name="junit-platform-commons" version="1.9.0">
+         <artifact name="junit-platform-commons-1.9.0.jar">
+            <sha256 value="e5894b710094b4caafc6280b8829a439fb764901ea0ae18d06ed80388b309b7a" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="org.junit.platform" name="junit-platform-engine" version="1.12.1">
          <artifact name="junit-platform-engine-1.12.1.jar">
             <sha256 value="7fedff93fd92aec7d29fc60dc01fa027246b36b8088423a5efc4949e5f6affa4" origin="Generated by Gradle"/>
@@ -4176,6 +4181,11 @@
             <sha256 value="aaec735f7444a9fc055e206598de3d829c24e9c7a8eea6efdeeb1962087fe811" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="org.junit.platform" name="junit-platform-engine" version="1.9.0">
+         <artifact name="junit-platform-engine-1.9.0.jar">
+            <sha256 value="aaec735f7444a9fc055e206598de3d829c24e9c7a8eea6efdeeb1962087fe811" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="org.junit.platform" name="junit-platform-launcher" version="1.12.1">
          <artifact name="junit-platform-launcher-1.12.1.jar">
             <sha256 value="ebbb14e7b29f60730eaede862ed69d7de0d581ea0c038fa6a202955c7541f525" origin="Generated by Gradle"/>
@@ -4746,6 +4756,11 @@
             <sha256 value="fea4b91afb5eb68a80007c9d88c8c189b5cd791d39d601d75c92e6f6bb587735" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="org.spockframework" name="spock-junit4" version="2.3-groovy-4.0">
+         <artifact name="spock-junit4-2.3-groovy-4.0.jar">
+            <sha256 value="fea4b91afb5eb68a80007c9d88c8c189b5cd791d39d601d75c92e6f6bb587735" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="org.subethamail" name="subethasmtp" version="3.1.7">
          <artifact name="subethasmtp-3.1.7.jar">
             <sha256 value="5196a0da2c5a33d1a04e88fc7a9cc109501bc265b5bac8edd9984a1885070ad4" origin="Generated by Gradle"/>
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 1b33c55baabb5..8bdaf60c75ab8 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 01450089d2c6c..6bf62392cf2d0 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,7 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=f759b8dd5204e2e3fa4ca3e73f452f087153cf81bac9561eeb854229cc2c5365
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-all.zip
+distributionSha256Sum=b84e04fa845fecba48551f425957641074fcc00a88a84d2aae5808743b35fc85
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-all.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/gradlew b/gradlew
index 23d15a9367071..adff685a0348c 100755
--- a/gradlew
+++ b/gradlew
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -114,7 +114,6 @@ case "$( uname )" in                #(
   NONSTOP* )        nonstop=true ;;
 esac
 
-CLASSPATH="\\\"\\\""
 
 
 # Determine the Java command to use to start the JVM.
@@ -172,7 +171,6 @@ fi
 # For Cygwin or MSYS, switch paths to Windows format before running java
 if "$cygwin" || "$msys" ; then
     APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
-    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
 
     JAVACMD=$( cygpath --unix "$JAVACMD" )
 
@@ -212,7 +210,6 @@ DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
-        -classpath "$CLASSPATH" \
         -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
         "$@"
 
diff --git a/gradlew.bat b/gradlew.bat
index 5eed7ee845284..e509b2dd8fe55 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -70,11 +70,10 @@ goto fail
 :execute
 @rem Setup the command line
 
-set CLASSPATH=
 
 
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
 
 :end
 @rem End local scope for the variables with windows NT shell
diff --git a/plugins/examples/gradle/wrapper/gradle-wrapper.properties b/plugins/examples/gradle/wrapper/gradle-wrapper.properties
index 01450089d2c6c..6bf62392cf2d0 100644
--- a/plugins/examples/gradle/wrapper/gradle-wrapper.properties
+++ b/plugins/examples/gradle/wrapper/gradle-wrapper.properties
@@ -1,7 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=f759b8dd5204e2e3fa4ca3e73f452f087153cf81bac9561eeb854229cc2c5365
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-all.zip
+distributionSha256Sum=b84e04fa845fecba48551f425957641074fcc00a88a84d2aae5808743b35fc85
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-all.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/x-pack/plugin/ml/build.gradle b/x-pack/plugin/ml/build.gradle
index 95fe4953748c8..a48ee9beed944 100644
--- a/x-pack/plugin/ml/build.gradle
+++ b/x-pack/plugin/ml/build.gradle
@@ -106,7 +106,6 @@ def mlCppVersion(){
       (project.version + "-SNAPSHOT") : project.version;
 }
 
-
 tasks.named('assemble').configure {
   dependsOn tasks.named('jar')
 }
diff --git a/x-pack/plugin/security/build.gradle b/x-pack/plugin/security/build.gradle
index c005e33d5650f..d6ccfe81c41e1 100644
--- a/x-pack/plugin/security/build.gradle
+++ b/x-pack/plugin/security/build.gradle
@@ -167,7 +167,6 @@ tasks.named("processTestResources").configure {
   from(project(xpackModule('core')).file('src/test/resources'))
 }
 
-
 tasks.named('assemble').configure {
   // normal es plugins do not publish the jar but we need to since users need it for extensions
   dependsOn tasks.named('jar')