diff --git a/Jenkinsfile b/Jenkinsfile
index 49fe482..a9629f0 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -25,7 +25,7 @@ pipeline {
             }
             steps {
                 script {
-                    def ask_for_certs = input message: 'Upload RootCA certificate and key', parameters: [file(name: 'rootca'), file(name: 'rootca_key')]
+                    def ask_for_certs = input message: 'Upload RootCA certificate and key', parameters: [base64File(name: 'rootca'), base64File(name: 'rootca_key')]
                 }
                 withFileParameter('rootca') {
                     sh 'mv ${rootca} roles/rproxy/files/RootCA.crt'