diff --git a/.circleci/config.yml b/.circleci/config.yml
index 00a5c88..1f46a17 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -7,7 +7,7 @@ jobs:
       - checkout
       - run:
           name: Install Graphiz
-          command: sudo apt-get install graphviz
+          command: sudo apt-get update && sudo apt-get install graphviz
       - run: |
           if [[ "$CIRCLE_TAG" != "" ]]; then
             VERSION="$(echo "$CIRCLE_TAG" | grep -Po '\d+\.\d+\.\d+')"
diff --git a/pom.xml b/pom.xml
index 0d9e971..8d8d7ff 100644
--- a/pom.xml
+++ b/pom.xml
@@ -27,7 +27,7 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.8.2</version>
+            <version>2.13.2</version>
         </dependency>