diff --git a/.idea/ThinkgearConnector.iml b/.idea/ThinkgearConnector.iml
index 6ca1761..06672f6 100644
--- a/.idea/ThinkgearConnector.iml
+++ b/.idea/ThinkgearConnector.iml
@@ -10,6 +10,7 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Maven: com.google.code.gson:gson:2.8.0" level="project" />
+    <orderEntry type="library" scope="PROVIDED" name="Maven: com.google.code.gson:gson:2.8.0" level="project" />
+    <orderEntry type="library" scope="PROVIDED" name="Maven: org.rxtx:rxtx:2.1.7" level="project" />
   </component>
 </module>
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 0a35cd6..80b3851 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,7 +69,13 @@
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
             <version>2.8.0</version>
-            <scope>compile</scope>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.rxtx</groupId>
+            <artifactId>rxtx</artifactId>
+            <version>2.1.7</version>
+            <scope>provided</scope>
         </dependency>
     </dependencies>
     
diff --git a/src/main/java/de/wolfi/thinkgearconnector/ThinkGearConnector.java b/src/main/java/de/wolfi/thinkgearconnector/ThinkGearConnector.java
index b7f9b65..7a4fa1d 100644
--- a/src/main/java/de/wolfi/thinkgearconnector/ThinkGearConnector.java
+++ b/src/main/java/de/wolfi/thinkgearconnector/ThinkGearConnector.java
@@ -3,9 +3,7 @@
 import com.google.gson.Gson;
 import de.wolfi.thinkgearconnector.json.*;
 
-import javax.comm.CommPort;
-import javax.comm.CommPortIdentifier;
-import javax.comm.PortInUseException;
+import gnu.io.*;
 import java.io.*;
 import java.net.Socket;
 import java.util.ArrayList;