diff --git a/build.gradle b/build.gradle
index 990d6e0f0c..2e0e3dc087 100644
--- a/build.gradle
+++ b/build.gradle
@@ -60,7 +60,7 @@ configure(allProjs) {
         scalaCheckVersion = '1.14.0'
         junitVersion = '4.12'
         avroVersion = '1.8.2'
-        sparkVersion = '2.4.4'
+        sparkVersion = '2.4.5'
         scalaGraphVersion = '1.12.5'
         scalafmtVersion = '1.5.1'
         hadoopVersion = 'hadoop2'
diff --git a/helloworld/build.gradle b/helloworld/build.gradle
index 760e95a23a..b1480bfe61 100644
--- a/helloworld/build.gradle
+++ b/helloworld/build.gradle
@@ -37,7 +37,7 @@ ext {
     scalaVersion = '2.11'
     scalaVersionRevision = '12'
     junitVersion = '4.12'
-    sparkVersion = '2.4.4'
+    sparkVersion = '2.4.5'
     scalatestVersion = '3.0.0'
     transmogrifaiVersion ='0.6.1'
     collectionsVersion = '3.2.2'
diff --git a/helloworld/notebooks/OpHousingPrices.ipynb b/helloworld/notebooks/OpHousingPrices.ipynb
index 76c6c59e17..b518ae06c4 100644
--- a/helloworld/notebooks/OpHousingPrices.ipynb
+++ b/helloworld/notebooks/OpHousingPrices.ipynb
@@ -25,7 +25,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "%classpath add mvn org.apache.spark spark-mllib_2.11 2.3.3"
+    "%classpath add mvn org.apache.spark spark-mllib_2.11 2.4.5"
    ]
   },
   {
diff --git a/helloworld/notebooks/OpIris.ipynb b/helloworld/notebooks/OpIris.ipynb
index 3e2fecd3d1..c68ebe406f 100644
--- a/helloworld/notebooks/OpIris.ipynb
+++ b/helloworld/notebooks/OpIris.ipynb
@@ -26,7 +26,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "%classpath add mvn org.apache.spark spark-mllib_2.11 2.4.4"
+    "%classpath add mvn org.apache.spark spark-mllib_2.11 2.4.5"
    ]
   },
   {
diff --git a/helloworld/notebooks/OpTitanicSimple.ipynb b/helloworld/notebooks/OpTitanicSimple.ipynb
index d1a82d3f1c..392886e6fb 100644
--- a/helloworld/notebooks/OpTitanicSimple.ipynb
+++ b/helloworld/notebooks/OpTitanicSimple.ipynb
@@ -31,7 +31,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "%classpath add mvn org.apache.spark spark-mllib_2.11 2.4.4"
+    "%classpath add mvn org.apache.spark spark-mllib_2.11 2.4.5"
    ]
   },
   {
diff --git a/pom.xml b/pom.xml
index 401b01e0b2..e051bdc181 100644
--- a/pom.xml
+++ b/pom.xml
@@ -242,7 +242,7 @@
         <dependency>
             <groupId>org.apache.spark</groupId>
             <artifactId>spark-sql_2.11</artifactId>
-            <version>2.4.4</version>
+            <version>2.4.5</version>
             <scope>compile</scope>
         </dependency>
         <dependency>