diff --git a/build.gradle b/build.gradle
index 03f00897..9e324079 100644
--- a/build.gradle
+++ b/build.gradle
@@ -19,7 +19,7 @@ configurations {
 }
 
 dependencies {
-    implementation "org.msgpack:msgpack-core:0.8.20"
+    implementation "org.msgpack:msgpack-core:0.9.9"
     implementation "com.fasterxml.jackson.core:jackson-databind:2.11.0"
     implementation "org.slf4j:slf4j-api:1.7.30"
     testImplementation "org.junit.jupiter:junit-jupiter-api:5.6.2"
diff --git a/gradle/dependency-locks/compileClasspath.lockfile b/gradle/dependency-locks/compileClasspath.lockfile
index d5fca883..40749dde 100644
--- a/gradle/dependency-locks/compileClasspath.lockfile
+++ b/gradle/dependency-locks/compileClasspath.lockfile
@@ -4,5 +4,5 @@
 com.fasterxml.jackson.core:jackson-annotations:2.11.0
 com.fasterxml.jackson.core:jackson-core:2.11.0
 com.fasterxml.jackson.core:jackson-databind:2.11.0
-org.msgpack:msgpack-core:0.8.20
+org.msgpack:msgpack-core:0.9.9
 org.slf4j:slf4j-api:1.7.30
diff --git a/gradle/dependency-locks/testCompileClasspath.lockfile b/gradle/dependency-locks/testCompileClasspath.lockfile
index ebb82d4b..f3287c80 100644
--- a/gradle/dependency-locks/testCompileClasspath.lockfile
+++ b/gradle/dependency-locks/testCompileClasspath.lockfile
@@ -10,6 +10,6 @@ org.apiguardian:apiguardian-api:1.1.0
 org.junit.jupiter:junit-jupiter-api:5.6.2
 org.junit.platform:junit-platform-commons:1.6.2
 org.junit:junit-bom:5.6.2
-org.msgpack:msgpack-core:0.8.20
+org.msgpack:msgpack-core:0.9.9
 org.opentest4j:opentest4j:1.2.0
 org.slf4j:slf4j-api:1.7.30