diff --git a/core/src/main/java/info/openrocket/core/database/Database.java b/core/src/main/java/info/openrocket/core/database/Database.java
index d60859be8..8aed3e00e 100644
--- a/core/src/main/java/info/openrocket/core/database/Database.java
+++ b/core/src/main/java/info/openrocket/core/database/Database.java
@@ -6,8 +6,6 @@ import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 
-import info.openrocket.core.database.DatabaseListener;
-
 /**
  * A database set. This class functions as a <code>Set</code> that contains
  * items
diff --git a/core/src/main/java/info/openrocket/core/rocketcomponent/InnerTube.java b/core/src/main/java/info/openrocket/core/rocketcomponent/InnerTube.java
index d70a23e6d..2e188604a 100644
--- a/core/src/main/java/info/openrocket/core/rocketcomponent/InnerTube.java
+++ b/core/src/main/java/info/openrocket/core/rocketcomponent/InnerTube.java
@@ -13,7 +13,6 @@ import info.openrocket.core.motor.Motor;
 import info.openrocket.core.motor.MotorConfiguration;
 import info.openrocket.core.motor.MotorConfigurationSet;
 import info.openrocket.core.preset.ComponentPreset;
-import info.openrocket.core.rocketcomponent.ThicknessRingComponent;
 import info.openrocket.core.rocketcomponent.position.AxialPositionable;
 import info.openrocket.core.startup.Application;
 import info.openrocket.core.util.BugException;
diff --git a/core/src/main/java/info/openrocket/core/simulation/customexpression/IndexExpression.java b/core/src/main/java/info/openrocket/core/simulation/customexpression/IndexExpression.java
index bc3239e1f..101fa7c2a 100644
--- a/core/src/main/java/info/openrocket/core/simulation/customexpression/IndexExpression.java
+++ b/core/src/main/java/info/openrocket/core/simulation/customexpression/IndexExpression.java
@@ -9,7 +9,6 @@ import de.congrace.exp4j.Calculable;
 import de.congrace.exp4j.Variable;
 import info.openrocket.core.document.OpenRocketDocument;
 import info.openrocket.core.logging.Markers;
-import info.openrocket.core.simulation.customexpression.CustomExpression;
 import info.openrocket.core.simulation.FlightDataBranch;
 import info.openrocket.core.simulation.FlightDataType;
 import info.openrocket.core.simulation.SimulationStatus;
diff --git a/core/src/main/java/info/openrocket/core/util/MonitorableSet.java b/core/src/main/java/info/openrocket/core/util/MonitorableSet.java
index 60e46e6d2..8ec934bcd 100644
--- a/core/src/main/java/info/openrocket/core/util/MonitorableSet.java
+++ b/core/src/main/java/info/openrocket/core/util/MonitorableSet.java
@@ -4,8 +4,6 @@ import java.util.Collection;
 import java.util.HashSet;
 import java.util.Iterator;
 
-import info.openrocket.core.util.ModID;
-
 /**
  * A Set that additionally implements the Monitorable interface.
  * 
diff --git a/core/src/test/java/info/openrocket/core/util/ModIDTest.java b/core/src/test/java/info/openrocket/core/util/ModIDTest.java
index 9a9209a28..f4d85bef3 100644
--- a/core/src/test/java/info/openrocket/core/util/ModIDTest.java
+++ b/core/src/test/java/info/openrocket/core/util/ModIDTest.java
@@ -1,7 +1,5 @@
 package info.openrocket.core.util;
 
-import info.openrocket.core.util.ModID;
-
 import static org.junit.jupiter.api.Assertions.*;
 
 import org.junit.jupiter.api.Test;