diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/api/AddonInitializer.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/api/AddonInitializer.java
index c3bebb971..e9b596996 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/api/AddonInitializer.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/api/AddonInitializer.java
@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.api;
 
 
diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddon.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddon.java
index 7fcb80385..90a419bad 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddon.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddon.java
@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.impl;
 
 import java.util.List;
diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddonClassLoader.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddonClassLoader.java
index bfc8fa01c..6a2923a3b 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddonClassLoader.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddonClassLoader.java
@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.impl;
 
 import java.net.URL;
diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddonLoader.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddonLoader.java
index b6768b978..d7117cf6d 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddonLoader.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/ManifestAddonLoader.java
@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.impl;
 
 import ca.solostudios.strata.Versions;
diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/AddonManifest.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/AddonManifest.java
index a6036ed87..50039afb5 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/AddonManifest.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/AddonManifest.java
@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.impl.config;
 
 import ca.solostudios.strata.version.Version;
diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/WebsiteConfig.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/WebsiteConfig.java
index 34e320ca9..050546c65 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/WebsiteConfig.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/WebsiteConfig.java
@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.impl.config;
 
 import com.dfsek.tectonic.annotations.Value;
diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/loaders/VersionLoader.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/loaders/VersionLoader.java
index 2f477fee6..5b1b4ea3c 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/loaders/VersionLoader.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/loaders/VersionLoader.java
@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.impl.config.loaders;
 
 import ca.solostudios.strata.Versions;
diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/loaders/VersionRangeLoader.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/loaders/VersionRangeLoader.java
index 00f427689..8b1715db6 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/loaders/VersionRangeLoader.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/config/loaders/VersionRangeLoader.java
@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.impl.config.loaders;
 
 import ca.solostudios.strata.Versions;
diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/AddonException.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/AddonException.java
index 03ccbd3a6..9fa06a2e4 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/AddonException.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/AddonException.java
@@ -1,6 +1,19 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.impl.exception;
 
+import java.io.Serial;
+
+
 public class AddonException extends RuntimeException {
+    @Serial
+    private static final long serialVersionUID = -4201912399458420090L;
+    
     public AddonException(String message) {
         super(message);
     }
diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/ManifestException.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/ManifestException.java
index eba6bd1d4..d076c8875 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/ManifestException.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/ManifestException.java
@@ -1,6 +1,19 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.impl.exception;
 
+import java.io.Serial;
+
+
 public class ManifestException extends AddonException {
+    @Serial
+    private static final long serialVersionUID = -2458077663176544645L;
+    
     public ManifestException(String message) {
         super(message);
     }
diff --git a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/ManifestNotPresentException.java b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/ManifestNotPresentException.java
index ba748d09a..010dcb86a 100644
--- a/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/ManifestNotPresentException.java
+++ b/common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/impl/exception/ManifestNotPresentException.java
@@ -1,6 +1,19 @@
+/*
+ * Copyright (c) 2020-2021 Polyhedral Development
+ *
+ * The Terra Core Addons are licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in this module's root directory.
+ */
+
 package com.dfsek.terra.addons.manifest.impl.exception;
 
+import java.io.Serial;
+
+
 public class ManifestNotPresentException extends ManifestException {
+    @Serial
+    private static final long serialVersionUID = -2116663180747013810L;
+    
     public ManifestNotPresentException(String message) {
         super(message);
     }