diff --git a/Jenkinsfile_3 b/Jenkinsfile_3
index 3c43992..70c3e13 100644
--- a/Jenkinsfile_3
+++ b/Jenkinsfile_3
@@ -12,7 +12,7 @@ pipeline {
       stage('Run Script') {
             steps {
                script {
-                sh 'docker build . -t jhenyk/ium:latest --build-arg epochs=$params.epochs_count'
+                sh 'docker build . -t jhenyk/ium:latest --build-arg epochs=${params.epochs_count}'
                 sh 'docker run jhenyk/ium:latest'
                }
             }