diff --git a/build.gradle b/build.gradle
index 030c408201..064a1cacfc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -44,7 +44,7 @@ ext {
 	rxjava2Version       = "2.2.2"
 	slf4jVersion         = "1.7.25"	  // spring-jcl + consistent 3rd party deps
 	tiles3Version        = "3.0.8"
-	tomcatVersion        = "9.0.11"
+	tomcatVersion        = "9.0.12"
 	undertowVersion      = "2.0.13.Final"
 
 	gradleScriptDir = "${rootProject.projectDir}/gradle"
diff --git a/spring-beans/spring-beans.gradle b/spring-beans/spring-beans.gradle
index ece9a9f88e..b475530b76 100644
--- a/spring-beans/spring-beans.gradle
+++ b/spring-beans/spring-beans.gradle
@@ -5,7 +5,7 @@ apply plugin: "groovy"
 dependencies {
 	compile(project(":spring-core"))
 	optional("javax.inject:javax.inject:1")
-	optional("org.yaml:snakeyaml:1.21")
+	optional("org.yaml:snakeyaml:1.23")
 	optional("org.codehaus.groovy:groovy-xml:${groovyVersion}")
 	optional("org.jetbrains.kotlin:kotlin-reflect:${kotlinVersion}")
 	optional("org.jetbrains.kotlin:kotlin-stdlib:${kotlinVersion}")