diff --git a/build.gradle b/build.gradle
index 2ed3a136..8d394095 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,7 +9,7 @@ ext {
     piSwtVersion = "3.8.2"
     junitVersion = "6.1.3"
     antVersion = "1.10.18"
-    commonsLang3Version = "3.20.0"
+    commonsLang3Version = "3.21.0"
     commonsCsvVersion = "1.14.1"
     gsonVersion = "2.14.0"
     picocliVersion = "4.7.7"