diff --git a/.github/workflows/spring-boot-4-matrix.yml b/.github/workflows/spring-boot-4-matrix.yml
index 450dbd8c98d..b467451142d 100644
--- a/.github/workflows/spring-boot-4-matrix.yml
+++ b/.github/workflows/spring-boot-4-matrix.yml
@@ -21,9 +21,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        springboot-version: [ '4.0.0', '4.0.5' ]
-
-    name: Spring Boot ${{ matrix.springboot-version }}
+        include:
+          - springboot-version: '4.0.0'
+            kotlin-version: '2.2.0'
+          - springboot-version: '4.0.5'
+            kotlin-version: '2.2.21'
+          - springboot-version: '4.1.0'
+            kotlin-version: '2.3.21'
+
+    name: Spring Boot ${{ matrix.springboot-version }} / Kotlin ${{ matrix.kotlin-version }}
     env:
       SENTRY_URL: http://127.0.0.1:8000
       GRADLE_ENCRYPTION_KEY: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
@@ -62,11 +68,16 @@ jobs:
         with:
           cache-encryption-key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
 
-      - name: Update Spring Boot 4.x version
+      - name: Update Spring Boot 4.x and Kotlin versions
         run: |
           springboot_version="${{ matrix.springboot-version }}"
+          kotlin_version="${{ matrix.kotlin-version }}"
+
           perl -0pi -e 'BEGIN { $v = shift } s/^springboot4[[:space:]]*=[[:space:]]*"\K[^"]*/$v/m or die "::error::springboot4 version entry not found in gradle/libs.versions.toml\n"' "$springboot_version" gradle/libs.versions.toml
+          perl -0pi -e 'BEGIN { $v = shift } s/^kotlin[[:space:]]*=[[:space:]]*"\K[^"]*/$v/m or die "::error::kotlin version entry not found in gradle/libs.versions.toml\n"' "$kotlin_version" gradle/libs.versions.toml
+
           echo "Updated Spring Boot 4.x version to $springboot_version"
+          echo "Updated Kotlin version to $kotlin_version"
 
       - name: Build sample artifacts
         run: |
diff --git a/sentry-samples/sentry-samples-spring-7/build.gradle.kts b/sentry-samples/sentry-samples-spring-7/build.gradle.kts
index e3300cd2841..182e2f83589 100644
--- a/sentry-samples/sentry-samples-spring-7/build.gradle.kts
+++ b/sentry-samples/sentry-samples-spring-7/build.gradle.kts
@@ -62,8 +62,8 @@ tasks.withType<KotlinCompile>().configureEach {
     // compiled against a newer version of Kotlin
     compilerOptions.freeCompilerArgs = listOf("-Xjsr305=strict", "-Xskip-metadata-version-check")
     compilerOptions.jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
-    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
-    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
+    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
+    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
   }
 }
 
diff --git a/sentry-samples/sentry-samples-spring-boot-4-opentelemetry-noagent/build.gradle.kts b/sentry-samples/sentry-samples-spring-boot-4-opentelemetry-noagent/build.gradle.kts
index 64ef57692c3..dd57056918c 100644
--- a/sentry-samples/sentry-samples-spring-boot-4-opentelemetry-noagent/build.gradle.kts
+++ b/sentry-samples/sentry-samples-spring-boot-4-opentelemetry-noagent/build.gradle.kts
@@ -30,8 +30,8 @@ tasks.withType<KotlinCompile>().configureEach {
     // compiled against a newer version of Kotlin
     compilerOptions.freeCompilerArgs = listOf("-Xjsr305=strict", "-Xskip-metadata-version-check")
     compilerOptions.jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
-    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
-    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
+    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
+    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
   }
 }
 
diff --git a/sentry-samples/sentry-samples-spring-boot-4-opentelemetry/build.gradle.kts b/sentry-samples/sentry-samples-spring-boot-4-opentelemetry/build.gradle.kts
index e12b960e0fd..392020a92e6 100644
--- a/sentry-samples/sentry-samples-spring-boot-4-opentelemetry/build.gradle.kts
+++ b/sentry-samples/sentry-samples-spring-boot-4-opentelemetry/build.gradle.kts
@@ -31,8 +31,8 @@ tasks.withType<KotlinCompile>().configureEach {
     // compiled against a newer version of Kotlin
     compilerOptions.freeCompilerArgs = listOf("-Xjsr305=strict", "-Xskip-metadata-version-check")
     compilerOptions.jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
-    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
-    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
+    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
+    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
   }
 }
 
diff --git a/sentry-samples/sentry-samples-spring-boot-4-otlp/build.gradle.kts b/sentry-samples/sentry-samples-spring-boot-4-otlp/build.gradle.kts
index 7329d5cc0ea..2cda59cf8f8 100644
--- a/sentry-samples/sentry-samples-spring-boot-4-otlp/build.gradle.kts
+++ b/sentry-samples/sentry-samples-spring-boot-4-otlp/build.gradle.kts
@@ -30,8 +30,8 @@ tasks.withType<KotlinCompile>().configureEach {
     // compiled against a newer version of Kotlin
     compilerOptions.freeCompilerArgs = listOf("-Xjsr305=strict", "-Xskip-metadata-version-check")
     compilerOptions.jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
-    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
-    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
+    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
+    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
   }
 }
 
diff --git a/sentry-samples/sentry-samples-spring-boot-4-webflux/build.gradle.kts b/sentry-samples/sentry-samples-spring-boot-4-webflux/build.gradle.kts
index a311b8a972e..8d5f94f1a36 100644
--- a/sentry-samples/sentry-samples-spring-boot-4-webflux/build.gradle.kts
+++ b/sentry-samples/sentry-samples-spring-boot-4-webflux/build.gradle.kts
@@ -57,8 +57,8 @@ tasks.withType<KotlinCompile>().configureEach {
     // compiled against a newer version of Kotlin
     compilerOptions.freeCompilerArgs = listOf("-Xjsr305=strict", "-Xskip-metadata-version-check")
     compilerOptions.jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
-    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
-    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
+    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
+    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
   }
 }
 
diff --git a/sentry-samples/sentry-samples-spring-boot-4/build.gradle.kts b/sentry-samples/sentry-samples-spring-boot-4/build.gradle.kts
index cdb33ecc675..7bb642da398 100644
--- a/sentry-samples/sentry-samples-spring-boot-4/build.gradle.kts
+++ b/sentry-samples/sentry-samples-spring-boot-4/build.gradle.kts
@@ -30,8 +30,8 @@ tasks.withType<KotlinCompile>().configureEach {
     // compiled against a newer version of Kotlin
     compilerOptions.freeCompilerArgs = listOf("-Xjsr305=strict", "-Xskip-metadata-version-check")
     compilerOptions.jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
-    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
-    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9
+    compilerOptions.languageVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
+    compilerOptions.apiVersion = org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_2_0
   }
 }