diff --git a/core/.classpath b/core/.classpath
index f0e5063a4..c14d2909c 100644
--- a/core/.classpath
+++ b/core/.classpath
@@ -27,7 +27,6 @@
 	<classpathentry kind="lib" path="lib/logback-classic-1.2.11.jar"/>
 	<classpathentry kind="lib" path="lib/logback-core-1.2.11.jar"/>
 	<classpathentry kind="lib" path="lib/opencsv-5.7.1.jar"/>
-	<classpathentry kind="lib" path="lib/commons-lang3-3.12.0.jar"/>
 	<classpathentry kind="lib" path="lib/commons-text-1.10.0.jar"/>
 	<classpathentry kind="lib" path="/OpenRocket Test Libraries/hamcrest-core-2.2.jar"/>
 	<classpathentry kind="lib" path="/OpenRocket Test Libraries/hamcrest-2.2.jar"/>
diff --git a/core/lib/commons-lang3-3.12.0.jar b/core/lib/commons-lang3-3.12.0.jar
deleted file mode 100644
index 4d434a2a4..000000000
Binary files a/core/lib/commons-lang3-3.12.0.jar and /dev/null differ
diff --git a/swing/.classpath b/swing/.classpath
index d464843c2..d337ce0b8 100644
--- a/swing/.classpath
+++ b/swing/.classpath
@@ -32,7 +32,6 @@
 	<classpathentry kind="lib" path="/OpenRocket Test Libraries/hamcrest-core-2.2.jar"/>
 	<classpathentry kind="lib" path="/OpenRocket Test Libraries/hamcrest-2.2.jar"/>
 	<classpathentry kind="lib" path="/OpenRocket Core/lib/opencsv-5.7.1.jar"/>
-	<classpathentry kind="lib" path="/OpenRocket Core/lib/commons-lang3-3.12.0.jar"/>
 	<classpathentry kind="lib" path="/OpenRocket Core/lib/commons-text-1.10.0.jar"/>
 	<classpathentry kind="lib" path="/OpenRocket Test Libraries/jmock-2.12.0.jar"/>
 	<classpathentry kind="lib" path="/OpenRocket Test Libraries/jmock-junit4-2.12.0.jar"/>
diff --git a/swing/build.xml b/swing/build.xml
index 01c3f622c..1f9315b43 100644
--- a/swing/build.xml
+++ b/swing/build.xml
@@ -117,7 +117,6 @@
 			<zipfileset src="${lib.dir}/jcommon-1.0.18.jar"/>
 			<zipfileset src="${lib.dir}/jfreechart-1.0.15.jar"/>
 			<zipfileset src="${core.dir}/lib/opencsv-5.7.1.jar"/>
-			<zipfileset src="${core.dir}/lib/commons-lang3-3.12.0.jar"/>
 			<zipfileset src="${core.dir}/lib/commons-text-1.10.0.jar"/>
 			<zipfileset src="${core.dir}/lib/annotation-detector-3.0.5.jar"/>
 			<zipfileset src="${core.dir}/lib/slf4j-api-1.7.30.jar"/>