diff --git a/build.gradle.kts b/build.gradle.kts
index 0be36f0..076f1f7 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -103,11 +103,6 @@ kotlin {
         val nativeTest by creating {
             dependsOn(fileBasedTest)
         }
-        val jvmMain by getting {
-            dependencies {
-                api("it.unimi.dsi:fastutil-core:8.5.12")
-            }
-        }
         val nativeSourceSets = listOf(
             "linuxX64",
             "linuxArm64",
diff --git a/src/jvmMain/kotlin/CommonDefsImplJvm.kt b/src/jvmMain/kotlin/CommonDefsImplJvm.kt
index b7341e7..59e55ef 100644
--- a/src/jvmMain/kotlin/CommonDefsImplJvm.kt
+++ b/src/jvmMain/kotlin/CommonDefsImplJvm.kt
@@ -1,15 +1,13 @@
 package org.intellij.markdown.html
 
-import it.unimi.dsi.fastutil.ints.IntArrayList
-import it.unimi.dsi.fastutil.ints.IntStack
+import org.intellij.markdown.lexer.Stack
 import java.net.URLEncoder
-import java.util.Stack
 
 actual class BitSet actual constructor(size: Int): java.util.BitSet(size){
     actual val size = size()
 }
 
-actual typealias IntStack = IntArrayList
+actual class IntStack: Stack<Int>()
 
 private const val PUNCTUATION_MASK: Int = (1 shl Character.DASH_PUNCTUATION.toInt()) or
         (1 shl Character.START_PUNCTUATION.toInt())     or