diff --git a/Jenkinsfile b/Jenkinsfile
index d665a57..6eea9a1 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -30,7 +30,7 @@ pipeline {
 
     stage('packing') {
       steps {
-        sh "dotnet pack ${env.WORKSPACE}/src/PiwigoDotnet.sln --no-restore -o ${env.WORKSPACE}/publish -p:Version=${env.PWDNVERSION}.${env.BUILD_NUMBER}"
+        sh "dotnet pack ${env.WORKSPACE}/src/PiwigoDotnet.sln --no-restore -c Release -o ${env.WORKSPACE}/publish -p:Version=${env.PWDNVERSION}.${env.BUILD_NUMBER}"
       }
     }