diff --git a/pyproject.toml b/pyproject.toml
index 8acc944..9c823d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,6 +64,7 @@ dependencies = [
     "playwright>=1.52.0",
     "rebrowser-playwright>=1.52.0",
     "camoufox[geoip]>=0.4.11",
+    "msgspec>=0.19.0",
 ]
 
 [project.urls]