diff --git a/backend/build.gradle.kts b/backend/build.gradle.kts
index 89644c65..214fc8dc 100644
--- a/backend/build.gradle.kts
+++ b/backend/build.gradle.kts
@@ -75,9 +75,9 @@ dependencies {
     testImplementation("io.kotest:kotest-assertions-core:5.9.1")
     testImplementation("io.kotest.extensions:kotest-extensions-spring:1.3.0")
     // Testcontainers to provide Postgres DB (https://testcontainers.org/)
-    testImplementation("org.testcontainers:testcontainers:1.19.8")
-    testImplementation("org.testcontainers:junit-jupiter:1.19.8")
-    testImplementation("org.testcontainers:postgresql:1.19.8")
+    testImplementation("org.testcontainers:testcontainers:1.20.1")
+    testImplementation("org.testcontainers:junit-jupiter:1.20.1")
+    testImplementation("org.testcontainers:postgresql:1.20.1")
     // Mocking with Mockk (https://mockk.io/)
     testImplementation("io.mockk:mockk:1.13.12")
 }
diff --git a/backend/gradle/wrapper/gradle-wrapper.jar b/backend/gradle/wrapper/gradle-wrapper.jar
index e6441136..2c352119 100644
Binary files a/backend/gradle/wrapper/gradle-wrapper.jar and b/backend/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/backend/gradle/wrapper/gradle-wrapper.properties b/backend/gradle/wrapper/gradle-wrapper.properties
index a4413138..09523c0e 100644
--- a/backend/gradle/wrapper/gradle-wrapper.properties
+++ b/backend/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/backend/gradlew b/backend/gradlew
index b740cf13..f5feea6d 100755
--- a/backend/gradlew
+++ b/backend/gradlew
@@ -15,6 +15,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 
 ##############################################################################
 #
@@ -84,7 +86,8 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
diff --git a/backend/gradlew.bat b/backend/gradlew.bat
index 7101f8e4..9b42019c 100644
--- a/backend/gradlew.bat
+++ b/backend/gradlew.bat
@@ -13,6 +13,8 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 @rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
 
 @if "%DEBUG%"=="" @echo off
 @rem ##########################################################################