diff --git a/pom.xml b/pom.xml
index 76c7117158..6f8937371c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -58,7 +58,7 @@
     <commons.javadoc.version>3.3.0</commons.javadoc.version>
 
     <graalvm.version>21.2.0</graalvm.version>
-    <commons.rng.version>1.3</commons.rng.version>
+    <commons.rng.version>1.4</commons.rng.version>
 
     <commons.japicmp.version>0.15.3</commons.japicmp.version>
     <japicmp.skip>false</japicmp.skip>
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index 6b84009d7b..b210ad47c8 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -91,6 +91,7 @@ The <action> type attribute can be add,update,fix,remove.
     <action                  type="update" dev="ggregory" due-to="Gary Gregory">Bump commons.project-info.version from 3.1.0 to 3.1.2.</action>
     <action                  type="update" dev="kinow" due-to="Dependabot">Bump jmh.version from 1.32 to 1.33 #254.</action>
     <action issue="TEXT=212" type="update" dev="kinow" due-to="Ali Ghanbari">A More Efficient Implementation for Calculating Size of Longest Common Subsequence</action>
+    <action                  type="update" dev="kinow" due-to="Dependabot">Bump commons-rng-simple from 1.3 to 1.4 #266.</action>
   </release>
   <release version="1.9" date="2020-07-21" description="Release 1.9. Requires Java 8.">
     <action issue="TEXT-166" type="fix" dev="kinow" due-to="Mikko Maunu">Removed non-existing parameter from Javadocs and spelled out parameters in throws.</action>