diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index ed32c51..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-language: java
-deploy:
-  provider: heroku
-  app: todo-backend-hexagonkt
-  api_key:
-    secure: 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
diff --git a/Procfile b/Procfile
deleted file mode 100644
index 2bfa220..0000000
--- a/Procfile
+++ /dev/null
@@ -1 +0,0 @@
-web: export SERVICE_bindPort=$PORT && export SERVICE_serviceUrl=$HOSTNAME  && export SERVICE_mongoDbUrl=$MONGODB_URI  && unzip build/distributions/todo_backend-1.0.0.zip && ./todo_backend-1.0.0/bin/todo_backend
diff --git a/build.gradle b/build.gradle
index bbe6de2..b931348 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,6 @@
 
 plugins {
-    id "org.jetbrains.kotlin.jvm" version "1.9.0"
+    id "org.jetbrains.kotlin.jvm" version "1.9.23"
 }
 
 // Build configuration is taken from helper scripts in Hexagon's repository
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 986e6bb..6c4b5b5 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -4,6 +4,6 @@ version: '3.9'
 services:
 
   mongodb:
-    image: mongo:6.0-jammy
+    image: mongo:7.0-jammy
     ports:
       - "27017:27017"
diff --git a/gradle.properties b/gradle.properties
index ed10c4e..6b73a78 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,8 +1,8 @@
 # suppress inspection "UnusedProperty" for whole file
 
 # BUILD PROPERTIES
-gradleScripts=https://raw.githubusercontent.com/hexagonkt/hexagon/3.0.0/gradle
+gradleScripts=https://raw.githubusercontent.com/hexagonkt/hexagon/3.5.3/gradle
 
 # VERSIONS
-hexagonVersion=3.0.0
-hexagonExtraVersion=3.0.0
+hexagonVersion=3.5.3
+hexagonExtraVersion=3.4.6
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 033e24c..e644113 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 42082d7..b82aa23 100644
--- 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-8.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/gradlew b/gradlew
index fcb6fca..1aa94a4 100755
--- a/gradlew
+++ b/gradlew
@@ -83,7 +83,8 @@ done
 # This is normally unused
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+# 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
@@ -144,7 +145,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
         # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
@@ -152,7 +153,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
       '' | soft) :;; #(
       *)
         # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -201,11 +202,11 @@ 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
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
diff --git a/gradlew.bat b/gradlew.bat
index 6689b85..7101f8e 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -43,11 +43,11 @@ set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
 if %ERRORLEVEL% equ 0 goto execute
 
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -57,11 +57,11 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail