diff --git a/pyproject.toml b/pyproject.toml
index a233e4f1..426555e8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ dev = [
     "pyrefly == 0.39.4",
 ]
 lsp = [
-    "pygls[ws] ~= 1.3.1",
+    "pygls[ws] >= 1.3.1,< 2.1.0",
 ]
 pretty = [
     "rich >= 12.6.0",