diff --git a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomPluginPacketSender.java b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomPluginPacketSender.java
index d710e835b..05ed2c9c6 100644
--- a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomPluginPacketSender.java
+++ b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomPluginPacketSender.java
@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.seibel.distanthorizons.cleanroom;
 
 import com.seibel.distanthorizons.common.AbstractPluginPacketSender;
diff --git a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomServerProxy.java b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomServerProxy.java
index f519d8d56..12f5f23db 100644
--- a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomServerProxy.java
+++ b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/CleanroomServerProxy.java
@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.seibel.distanthorizons.cleanroom;
 
 import com.seibel.distanthorizons.common.AbstractModInitializer;
diff --git a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/DistantHorizonsConfigPlugin.java b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/DistantHorizonsConfigPlugin.java
index 25cc537ff..3a693feaf 100644
--- a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/DistantHorizonsConfigPlugin.java
+++ b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/DistantHorizonsConfigPlugin.java
@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.seibel.distanthorizons.cleanroom;
 
 import net.minecraftforge.fml.common.Loader;
diff --git a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/DistantHorizonsLoadingPlugin.java b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/DistantHorizonsLoadingPlugin.java
index d5192755f..a604cba7f 100644
--- a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/DistantHorizonsLoadingPlugin.java
+++ b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/DistantHorizonsLoadingPlugin.java
@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.seibel.distanthorizons.cleanroom;
 
 import net.minecraftforge.fml.relauncher.IFMLLoadingPlugin;
diff --git a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinEntityRenderer.java b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinEntityRenderer.java
index e5aeea3f5..fba494e58 100644
--- a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinEntityRenderer.java
+++ b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinEntityRenderer.java
@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.seibel.distanthorizons.cleanroom.mixins.client;
 
 import com.seibel.distanthorizons.common.wrappers.minecraft.MinecraftRenderWrapper;
diff --git a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinNetHandlerPlayClient.java b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinNetHandlerPlayClient.java
index 057a638df..3f99f5f7c 100644
--- a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinNetHandlerPlayClient.java
+++ b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinNetHandlerPlayClient.java
@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.seibel.distanthorizons.cleanroom.mixins.client;
 
 import com.seibel.distanthorizons.core.api.internal.ClientApi;
diff --git a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinRenderGlobal.java b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinRenderGlobal.java
index 434f766fa..44ba6e158 100644
--- a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinRenderGlobal.java
+++ b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/client/MixinRenderGlobal.java
@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.seibel.distanthorizons.cleanroom.mixins.client;
 
 import com.seibel.distanthorizons.common.wrappers.world.ClientLevelWrapper;
diff --git a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/server/MixinEntityPlayerMP.java b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/server/MixinEntityPlayerMP.java
index d4d85b389..7f4c9f15c 100644
--- a/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/server/MixinEntityPlayerMP.java
+++ b/cleanroom/src/main/java/com/seibel/distanthorizons/cleanroom/mixins/server/MixinEntityPlayerMP.java
@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod
+ *    licensed under the GNU LGPL v3 License.
+ *
+ *    Copyright (C) 2020 James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.seibel.distanthorizons.cleanroom.mixins.server;
 
 import com.seibel.distanthorizons.common.wrappers.misc.IMixinServerPlayer;