diff --git a/Jenkins.Net/Utilities/JenkinsJobRunner.cs b/Jenkins.Net/Utilities/JenkinsJobRunner.cs
index 2110c61..2b6881a 100644
--- a/Jenkins.Net/Utilities/JenkinsJobRunner.cs
+++ b/Jenkins.Net/Utilities/JenkinsJobRunner.cs
@@ -28,7 +28,7 @@ namespace JenkinsNET.Utilities
     /// </summary>
     public class JenkinsJobRunner
     {
-        public JenkinsClient Client {get;}
+        public IJenkinsClient Client {get;}
         protected ProgressiveTextReader textReader;
         protected bool isJobStarted;
 
@@ -91,7 +91,7 @@ public class JenkinsJobRunner
         /// <summary>
         /// Creates a new JobRunner using the provided Jenkins-Client.
         /// </summary>
-        public JenkinsJobRunner(JenkinsClient client)
+        public JenkinsJobRunner(IJenkinsClient client)
         {
             this.Client = client ?? throw new ArgumentNullException(nameof(client));
         }
diff --git a/Jenkins.Net/Utilities/ProgressiveTextReader.cs b/Jenkins.Net/Utilities/ProgressiveTextReader.cs
index a29e69e..54553e6 100644
--- a/Jenkins.Net/Utilities/ProgressiveTextReader.cs
+++ b/Jenkins.Net/Utilities/ProgressiveTextReader.cs
@@ -18,7 +18,7 @@ namespace JenkinsNET.Utilities
     /// </summary>
     public class ProgressiveTextReader
     {
-        private readonly JenkinsClient client;
+        private readonly IJenkinsClient client;
         private readonly string jobName;
         private readonly string buildNumber;
         private int readPos;
@@ -46,7 +46,7 @@ public class ProgressiveTextReader
         /// <param name="client">The Jenkins client to use for network operations.</param>
         /// <param name="jobName">The name of the Jenkins Job.</param>
         /// <param name="buildNumber">The build-number of the running Jenkins Job.</param>
-        public ProgressiveTextReader(JenkinsClient client, string jobName, string buildNumber)
+        public ProgressiveTextReader(IJenkinsClient client, string jobName, string buildNumber)
         {
             this.client = client ?? throw new ArgumentNullException(nameof(client));
             this.jobName = jobName ?? throw new ArgumentNullException(nameof(jobName));