diff --git a/pyproject.toml b/pyproject.toml
index ff243ab51f..bfa6a4ff4f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -84,7 +84,7 @@ sql_postgres = [
     "asyncpg>=0.24.0"
 ]
 stagehand = [
-    "stagehand>=3.19.5",
+    "stagehand>=3.19.5,<4.0.0",
     "playwright>=1.27.0",
     "apify_fingerprint_datapoints>=0.0.2",
     "browserforge>=1.2.3",
diff --git a/uv.lock b/uv.lock
index 1cfc5d0fbc..c10a3d4594 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1003,7 +1003,7 @@ requires-dist = [
     { name = "sqlalchemy", extras = ["asyncio"], marker = "extra == 'sql-mysql'", specifier = ">=2.0.0,<3.0.0" },
     { name = "sqlalchemy", extras = ["asyncio"], marker = "extra == 'sql-postgres'", specifier = ">=2.0.0,<3.0.0" },
     { name = "sqlalchemy", extras = ["asyncio"], marker = "extra == 'sql-sqlite'", specifier = ">=2.0.0,<3.0.0" },
-    { name = "stagehand", marker = "extra == 'stagehand'", specifier = ">=3.19.5" },
+    { name = "stagehand", marker = "extra == 'stagehand'", specifier = ">=3.19.5,<4.0.0" },
     { name = "tldextract", specifier = ">=5.3.0" },
     { name = "typer", marker = "extra == 'cli'", specifier = ">=0.26.0" },
     { name = "typing-extensions", specifier = ">=4.10.0" },