diff --git a/build.gradle.kts b/build.gradle.kts
index 944f19b205db84b7dcb79c35111ce30afbc82bba..955328030780c4a75188f66d1f0e41890a2c61ea 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -36,7 +36,7 @@ dependencies {
 
 
     // eclipse lsp implementation
-    implementation("org.eclipse.lsp4j", "org.eclipse.lsp4j",  "0.21.0")
+    implementation("org.eclipse.lsp4j", "org.eclipse.lsp4j", "0.20.1")
 
     // json converter
     implementation("com.google.code.gson" ,"gson" ,"2.10.1")