diff --git a/composer.json b/composer.json
index dfec617..90965b2 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
     "symfony/http-foundation": "^3.4.35 || ^4.2.12 || ^5.0.7",
     "symfony/routing": "^3.4 || ^4.0 || ^5.0",
     "psr/log": "^1.1",
-    "phpseclib/phpseclib": "^2.0 || ^3.0",
+    "phpseclib/phpseclib": "^2.0.31 || ^3.0.7",
     "symfony/dependency-injection": "^3.4.26 || ^4.1.12 || ^5.0",
     "symfony/security-bundle": "^3.4 || ^4.0 || ^5.0",
     "symfony/security-core": "^3.4 || ^4.0 || ^5.0",