diff --git a/pom.xml b/pom.xml
index af33ef942..398c6b45f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -32,7 +32,7 @@
     <jersey.version>2.14</jersey.version>
     <SqlRender.version>1.19.1</SqlRender.version>
     <hive-jdbc.version>3.1.2</hive-jdbc.version>
-    <pac4j.version>4.0.0</pac4j.version>
+    <pac4j.version>4.5.5</pac4j.version>
     <jackson.version>2.12.7</jackson.version>
     <start-class>org.ohdsi.webapi.WebApi</start-class>
     <skipUnitTests>false</skipUnitTests>