diff --git a/buildSrc/src/main/kotlin/Versions.kt b/buildSrc/src/main/kotlin/Versions.kt
index b422a793..2b4e343f 100644
--- a/buildSrc/src/main/kotlin/Versions.kt
+++ b/buildSrc/src/main/kotlin/Versions.kt
@@ -6,7 +6,7 @@ object Versions {
     const val commonsCompress = "1.20"
     const val dependencyLicenseReport = "1.16"
     const val dokka = "1.4.20"
-    const val fastutil = "8.4.4"
+    const val fastutil = "8.5.1"
     const val fernflower = "1.1.0"
     const val flyway = "7.5.2"
     const val guava = "30.1-jre"