diff --git a/include/ssl_key_handler.hpp b/include/ssl_key_handler.hpp
index 24e40a4..42a284a 100644
--- a/include/ssl_key_handler.hpp
+++ b/include/ssl_key_handler.hpp
@@ -199,6 +199,7 @@
         X509_free(cert);
         return nullptr;
     }
+    BIO_free(certFileBio);
     return cert;
 }