diff --git a/cmd/gomuks/server.go b/cmd/gomuks/server.go
index feb3bed..fef3085 100644
--- a/cmd/gomuks/server.go
+++ b/cmd/gomuks/server.go
@@ -146,6 +146,7 @@ func (gmx *Gomuks) writeTokenCookie(w http.ResponseWriter) {
 		Value:    token,
 		Expires:  expiry,
 		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
 	})
 }