diff --git a/build.gradle b/build.gradle
index 5550db8..f91b27c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,12 +14,12 @@ plugins {
 import com.vanniktech.maven.publish.JavaLibrary
 import com.vanniktech.maven.publish.JavadocJar
 
-group 'com.digitalsanctuary.cf.turnstile'
+group = 'com.digitalsanctuary.cf.turnstile'
 // version '1.1.6-SNAPSHOT'
 description = 'SpringBoot Cloudflare Turnstile Library'
 
 ext {
-    springBootVersion = '3.5.7'
+    springBootVersion = '4.0.1'
     lombokVersion = '1.18.42'
 }
 
diff --git a/src/main/java/com/digitalsanctuary/cf/turnstile/TurnstileConfiguration.java b/src/main/java/com/digitalsanctuary/cf/turnstile/TurnstileConfiguration.java
index 9e63c70..c36b92c 100644
--- a/src/main/java/com/digitalsanctuary/cf/turnstile/TurnstileConfiguration.java
+++ b/src/main/java/com/digitalsanctuary/cf/turnstile/TurnstileConfiguration.java
@@ -1,6 +1,6 @@
 package com.digitalsanctuary.cf.turnstile;
 
-import org.springframework.boot.actuate.autoconfigure.health.ConditionalOnEnabledHealthIndicator;
+import org.springframework.boot.health.autoconfigure.contributor.ConditionalOnEnabledHealthIndicator;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.context.annotation.Configuration;
@@ -70,7 +70,7 @@ static class TurnstileMetricsConfiguration {
      */
     @Configuration
     @ConditionalOnEnabledHealthIndicator("turnstile")
-    @ConditionalOnClass(name = "org.springframework.boot.actuate.health.HealthIndicator")
+    @ConditionalOnClass(name = "org.springframework.boot.health.contributor.HealthIndicator")
     @Import(TurnstileHealthIndicator.class)
     static class TurnstileHealthConfiguration {
     }
diff --git a/src/main/java/com/digitalsanctuary/cf/turnstile/config/TurnstileHealthIndicator.java b/src/main/java/com/digitalsanctuary/cf/turnstile/config/TurnstileHealthIndicator.java
index 73fc087..bb48fe5 100644
--- a/src/main/java/com/digitalsanctuary/cf/turnstile/config/TurnstileHealthIndicator.java
+++ b/src/main/java/com/digitalsanctuary/cf/turnstile/config/TurnstileHealthIndicator.java
@@ -1,7 +1,7 @@
 package com.digitalsanctuary.cf.turnstile.config;
 
-import org.springframework.boot.actuate.health.Health;
-import org.springframework.boot.actuate.health.HealthIndicator;
+import org.springframework.boot.health.contributor.Health;
+import org.springframework.boot.health.contributor.HealthIndicator;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.stereotype.Component;
 
diff --git a/src/main/java/com/digitalsanctuary/cf/turnstile/config/TurnstileMetricsConfig.java b/src/main/java/com/digitalsanctuary/cf/turnstile/config/TurnstileMetricsConfig.java
index 823c3ba..bdb3910 100644
--- a/src/main/java/com/digitalsanctuary/cf/turnstile/config/TurnstileMetricsConfig.java
+++ b/src/main/java/com/digitalsanctuary/cf/turnstile/config/TurnstileMetricsConfig.java
@@ -1,6 +1,6 @@
 package com.digitalsanctuary.cf.turnstile.config;
 
-import org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryCustomizer;
+import org.springframework.boot.micrometer.metrics.autoconfigure.MeterRegistryCustomizer;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.context.annotation.Bean;