diff --git a/src/main/java/io/github/zekerzhayard/forgewrapper/installer/Bootstrap.java b/src/main/java/io/github/zekerzhayard/forgewrapper/installer/Bootstrap.java
index 90d3325..88c3a00 100644
--- a/src/main/java/io/github/zekerzhayard/forgewrapper/installer/Bootstrap.java
+++ b/src/main/java/io/github/zekerzhayard/forgewrapper/installer/Bootstrap.java
@@ -62,6 +62,10 @@ public static void bootstrap(String[] jvmArgs, String minecraftJar, String libra
             }
         }
 
+        if (System.getProperty("libraryDirectory") == null) {
+            System.setProperty("libraryDirectory", libraryDir);
+        }
+
         if (modulePath != null) {
             ModuleUtil.addModules(modulePath);
         }