diff --git a/router-openapi-request-validator/build.gradle.kts b/router-openapi-request-validator/build.gradle.kts
index c304237d..981d1537 100644
--- a/router-openapi-request-validator/build.gradle.kts
+++ b/router-openapi-request-validator/build.gradle.kts
@@ -12,5 +12,5 @@ dependencies {
     testImplementation("org.junit.jupiter:junit-jupiter-engine:5.9.1")
     testImplementation("org.assertj:assertj-core:3.23.1")
     testImplementation("io.mockk:mockk:1.13.3")
-    testImplementation("org.slf4j:slf4j-simple:2.0.5")
+    testImplementation("org.slf4j:slf4j-simple:2.0.9")
 }
\ No newline at end of file
diff --git a/router-protobuf/build.gradle.kts b/router-protobuf/build.gradle.kts
index a42d4c64..8afb8d72 100644
--- a/router-protobuf/build.gradle.kts
+++ b/router-protobuf/build.gradle.kts
@@ -23,7 +23,7 @@ dependencies {
     testImplementation("com.willowtreeapps.assertk:assertk-jvm:0.25")
     testImplementation("org.assertj:assertj-core:3.23.1")
     testImplementation("io.mockk:mockk:1.13.3")
-    testImplementation("org.slf4j:slf4j-simple:2.0.5")
+    testImplementation("org.slf4j:slf4j-simple:2.0.9")
     testImplementation("com.jayway.jsonpath:json-path:2.7.0")
 }