diff --git a/build.gradle.kts b/build.gradle.kts
index 6699a1b0..d4bf2304 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
     jacoco
     signing
     `maven-publish`
-    kotlin("plugin.serialization") version "1.9.0"
+    kotlin("plugin.serialization") version "1.9.21"
     alias(libs.plugins.openapi.generator)
     alias(libs.plugins.publish.nexus)
 }
diff --git a/client/build.gradle.kts b/client/build.gradle.kts
index 6329e4db..675d1e18 100644
--- a/client/build.gradle.kts
+++ b/client/build.gradle.kts
@@ -1,5 +1,5 @@
 plugins{
-    kotlin("jvm") version "1.9.0"
+    kotlin("jvm") version "1.9.21"
     `maven-publish`
     java
     idea
diff --git a/gradle.properties b/gradle.properties
index 46f32cc6..d215f13b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,3 @@
-kotlinVersion=1.9.0
+kotlinVersion=1.9.21
 kotlin.code.style=official
 org.gradle.jvmargs=-Xmx1024m
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 0305a313..6234b0ff 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -3,14 +3,14 @@ blockApi = "0.2.1"
 eventStream = "0.6.3"
 exposed = "0.41.1"
 h2database = "2.1.214"
-kotlinxCore = "1.7.2"
-kotlinxCli = "0.3.5"
-kotlinxDateTime = "0.4.0"
-kotlinReflect = "1.9.0"
-kotlinStdLib = "1.9.0"
+kotlinxCore = "1.7.3"
+kotlinxCli = "0.3.6"
+kotlinxDateTime = "0.5.0"
+kotlinReflect = "1.9.21"
+kotlinStdLib = "1.9.21"
 junitPioneer = "1.9.1"
 junit = "5.9.2"
-mockk = "1.13.5"
+mockk = "1.13.8"
 commonsText = "1.10.0"
 commonscsv = "1.10.0"
 commonsio = "2.11.0"
@@ -27,13 +27,13 @@ gson = "2.10.1"
 grpc = "1.53.0"
 grpcCore = "1.54.1"
 grpcKotlin = "1.3.0"
-kotlinSerialization = "1.5.1"
+kotlinSerialization = "1.6.2"
 dbUtils = "1.7"
 ravendb = "5.4.0"
 hdWallet = "0.1.15"
 jacksonModule = "2.14.2"
 ktor = "1.6.8" # A handful of plugins don't support ktor 2.0 yet due diligence before upgrading.
-ktorSerializationGson = "2.3.2"
+ktorSerializationGson = "2.3.7"
 okhttp = "4.10.0"
 kodein = "7.18.0"
 swaggerKtor="0.3-beta.3"
diff --git a/service/build.gradle.kts b/service/build.gradle.kts
index 6e3f337f..47810311 100644
--- a/service/build.gradle.kts
+++ b/service/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
     kotlin("jvm")
-    kotlin("plugin.serialization").version("1.9.0")
+    kotlin("plugin.serialization").version("1.9.21")
     application
     java
     idea