diff --git a/.idea/libraries/fastutil_min.xml b/.idea/libraries/fastutil_min.xml
index 14fa1fad89f4..92233238d72e 100644
--- a/.idea/libraries/fastutil_min.xml
+++ b/.idea/libraries/fastutil_min.xml
@@ -1,9 +1,9 @@
 <component name="libraryTable">
   <library name="fastutil-min" type="repository">
-    <properties include-transitive-deps="false" maven-id="org.jetbrains.intellij.deps.fastutil:intellij-deps-fastutil:8.5.14-jb1">
+    <properties include-transitive-deps="false" maven-id="org.jetbrains.intellij.deps.fastutil:intellij-deps-fastutil:8.5.15-jb1">
       <verification>
-        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/intellij/deps/fastutil/intellij-deps-fastutil/8.5.14-jb1/intellij-deps-fastutil-8.5.14-jb1.jar">
-          <sha256sum>d9652a225d86e5420d1a07b2bd5be33cdaff9184a2522ced837bd3b963e7f4a4</sha256sum>
+        <artifact url="file://$MAVEN_REPOSITORY$/org/jetbrains/intellij/deps/fastutil/intellij-deps-fastutil/8.5.15-jb1/intellij-deps-fastutil-8.5.15-jb1.jar">
+          <sha256sum>5a0d7557d494732a6165e4188eb11f10faca196350cad04d9950abd83e6dd148</sha256sum>
         </artifact>
       </verification>
     </properties>
@@ -11,11 +11,11 @@
       <root url="file://$PROJECT_DIR$/lib/annotations/fastutil" />
     </ANNOTATIONS>
     <CLASSES>
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/intellij/deps/fastutil/intellij-deps-fastutil/8.5.14-jb1/intellij-deps-fastutil-8.5.14-jb1.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/intellij/deps/fastutil/intellij-deps-fastutil/8.5.15-jb1/intellij-deps-fastutil-8.5.15-jb1.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES>
-      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/intellij/deps/fastutil/intellij-deps-fastutil/8.5.14-jb1/intellij-deps-fastutil-8.5.14-jb1-sources.jar!/" />
+      <root url="jar://$MAVEN_REPOSITORY$/org/jetbrains/intellij/deps/fastutil/intellij-deps-fastutil/8.5.15-jb1/intellij-deps-fastutil-8.5.15-jb1-sources.jar!/" />
     </SOURCES>
   </library>
 </component>
\ No newline at end of file
diff --git a/platform/build-scripts/codeOptimizer/src/optimizeLib.kt b/platform/build-scripts/codeOptimizer/src/optimizeLib.kt
index b99deb72e085..4fe011f544b3 100644
--- a/platform/build-scripts/codeOptimizer/src/optimizeLib.kt
+++ b/platform/build-scripts/codeOptimizer/src/optimizeLib.kt
@@ -16,7 +16,7 @@ internal data class OptimizeLibraryContext(@JvmField val tempDir: Path, @JvmFiel
 
 private data class LibDescriptor(@JvmField val id: String, @JvmField val version: String, @JvmField val jbVersion: Int)
 
-private val fastUtil = LibDescriptor(id = "fastutil", version = "8.5.14", jbVersion = 1)
+private val fastUtil = LibDescriptor(id = "fastutil", version = "8.5.15", jbVersion = 1)
 
 @Suppress("unused")
 internal object FastutilInstall {