Update dependencies.

Change-Id: Ia839fa2330de46cc035356fc5e6236d928b62c8d
diff --git a/pom.xml b/pom.xml
index d181a25..d2c550d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,7 +29,7 @@
 
     <basic-annotations.version>0.2.0</basic-annotations.version>
     <findbugs-jsr305.version>3.0.2</findbugs-jsr305.version>
-    <flexmark.version>0.61.20</flexmark.version>
+    <flexmark.version>0.61.24</flexmark.version>
     <google.java.format.version>1.7</google.java.format.version>
     <hibernate.version>5.4.14.Final</hibernate.version>
     <hibernate-types.version>2.9.9</hibernate-types.version>