diff --git a/src/main/java/de/ph87/electro/circuit/part/parts/Voltmeter.java b/src/main/java/de/ph87/electro/circuit/part/parts/Voltmeter.java
index 2d77ef3..1ef9657 100644
--- a/src/main/java/de/ph87/electro/circuit/part/parts/Voltmeter.java
+++ b/src/main/java/de/ph87/electro/circuit/part/parts/Voltmeter.java
@@ -3,7 +3,7 @@ package de.ph87.electro.circuit.part.parts;
 import de.ph87.electro.circuit.part.InnerConnection;
 import de.ph87.electro.circuit.part.Part;
 import de.ph87.electro.circuit.part.PartDto;
-import de.ph87.electro.circuit.part.node.Node;
+import de.ph87.electro.common.RotationMatrix;
 import lombok.Getter;
 import lombok.Setter;
 import org.apache.commons.math3.linear.ArrayRealVector;
diff --git a/src/main/java/de/ph87/electro/circuit/part/parts/RotationMatrix.java b/src/main/java/de/ph87/electro/common/RotationMatrix.java
similarity index 93%
rename from src/main/java/de/ph87/electro/circuit/part/parts/RotationMatrix.java
rename to src/main/java/de/ph87/electro/common/RotationMatrix.java
index 650d2b8..e08d70c 100644
--- a/src/main/java/de/ph87/electro/circuit/part/parts/RotationMatrix.java
+++ b/src/main/java/de/ph87/electro/common/RotationMatrix.java
@@ -1,4 +1,4 @@
-package de.ph87.electro.circuit.part.parts;
+package de.ph87.electro.common;
 
 import org.apache.commons.math3.linear.Array2DRowRealMatrix;
 import org.apache.commons.math3.linear.RealMatrix;