diff --git a/router-protobuf/build.gradle.kts b/router-protobuf/build.gradle.kts
index 3c68060a..619756e6 100644
--- a/router-protobuf/build.gradle.kts
+++ b/router-protobuf/build.gradle.kts
@@ -13,7 +13,7 @@ dependencies {
     implementation(kotlin("stdlib-jdk8"))
     implementation(kotlin("reflect"))
 
-    implementation("org.slf4j:slf4j-api:2.0.5")
+    implementation("org.slf4j:slf4j-api:2.0.9")
     api("com.google.protobuf:protobuf-java:3.25.1")
     api("com.google.protobuf:protobuf-java-util:3.25.1")
     implementation("com.google.guava:guava:31.1-jre")
diff --git a/router/build.gradle.kts b/router/build.gradle.kts
index a474d1ed..6a706dbc 100644
--- a/router/build.gradle.kts
+++ b/router/build.gradle.kts
@@ -6,7 +6,7 @@ dependencies {
     api("com.amazonaws:aws-lambda-java-core:1.2.2")
     api("com.amazonaws:aws-lambda-java-events:3.11.3")
 
-    implementation("org.slf4j:slf4j-api:2.0.5")
+    implementation("org.slf4j:slf4j-api:2.0.9")
     api("com.fasterxml.jackson.core:jackson-databind:2.14.1")
     api("com.fasterxml.jackson.module:jackson-module-kotlin:2.14.1")
     api("com.google.guava:guava:31.1-jre")