diff --git a/buildSrc/src/main/java/Versions.kt b/buildSrc/src/main/java/Versions.kt
index dac054bc..e05b5169 100644
--- a/buildSrc/src/main/java/Versions.kt
+++ b/buildSrc/src/main/java/Versions.kt
@@ -6,7 +6,7 @@ object Versions {
     const val commonsCompress = "1.20"
     const val dependencyLicenseReport = "1.14"
     const val dokka = "0.10.1"
-    const val fastutil = "8.3.1"
+    const val fastutil = "8.4.0"
     const val fernflower = "1.0.4-SNAPSHOT"
     const val guava = "29.0-jre"
     const val guice = "4.2.3"